All Object Lessons
Science & Nature

The Prosthetic Limb: A New Body Part, Designed for the Real World

⏱ 45 minutes 🎓 Primary & Secondary 📚 science, history, ethics, citizenship, art
Core question How did two men in 1960s India invent a prosthetic foot that costs $50 instead of $12,000 and lets users squat, walk barefoot, and work in mud — and what does their invention teach us about who designs solutions for whom?
Children fitted with the Jaipur Foot, the Indian-designed prosthetic that has been given to over 1.5 million amputees worldwide. Designed by Dr P.K. Sethi and craftsman Ram Chandra Sharma in 1968, it costs about $50 instead of $12,000 — and lets users squat, walk barefoot, and work in mud. Photo: Raja Ramesh / Wikimedia Commons / CC BY-SA 4.0
Introduction

Imagine being a farmer in rural India in the 1960s. You have lost a leg below the knee — perhaps to a road accident, a landmine, or untreated infection. You walk with crutches now, slowly and painfully. You cannot work in your fields. You cannot sit cross-legged on the floor with your family for meals — the way most Indians sit. You cannot squat to wash clothes or use a traditional toilet. You cannot pray in the kneeling positions your religion requires. You cannot walk barefoot — the way most people in your village walk most of the time. There are prosthetic limbs in the world. But the modern prosthetic, designed in Europe and America, was made for European and American life. It assumed you would wear shoes. It assumed you would sit on chairs. It assumed dry, paved surfaces. It cost thousands of dollars — far more than you could ever afford. In your village, the prosthetic was useless even if you could get one. In 1968, two men in Jaipur, India, decided to do something about this. Dr Pramod Karan Sethi was a young orthopaedic surgeon at Sawai Man Singh Medical College. He had been treating amputees for years, and he was tired of fitting them with Western prostheses they could not use. Ram Chandra Sharma was a craftsman at the same hospital — a sculptor and tinkerer who had a feel for what would work. According to legend, the idea came to Sharma after he had a flat tyre on his bicycle. Why couldn't a prosthetic foot be made from rubber, like a tyre? Sethi and Sharma worked together. Sharma cast prototypes in sand moulds. Sethi tested them on patients and watched what worked and what failed. After eighteen months of trial and error, they had it. A foot of vulcanised rubber and wood, with enough flexibility to allow squatting and cross-legged sitting. Waterproof. Walkable barefoot. Realistic enough to look like a real foot. And cost — about $5 in the original version, around $50 today. They did not patent it. The design was given freely to anyone who wanted to make it. This is the Jaipur Foot. By 2024, over 1.45 million amputees in 27 countries had received Jaipur Feet, mostly free of charge through the BMVSS charity. The foot has been used in war zones — Afghanistan, Iraq, Cambodia, Sri Lanka — to help landmine victims walk again. It has helped earthquake survivors, traffic accident victims, and people born with congenital amputations. Time magazine named it one of the great inventions of the 20th century. This lesson asks how Indian innovation created what Western prosthetics could not, what the Jaipur Foot teaches us about good design, and what disability looks like when the right tools are available.

The object
Origin
Prosthetic limbs have existed since ancient Egypt — the oldest known is a 3,000-year-old wooden toe found on an Egyptian mummy. The Jaipur Foot was developed in Jaipur, India, in 1968 by orthopaedic surgeon Dr Pramod Karan Sethi and craftsman Ram Chandra Sharma at Sawai Man Singh Medical College.
Period
Prosthetics have been refined for thousands of years. The modern era began with European limb-makers serving wounded soldiers in the 16th-17th centuries. The Jaipur Foot dates from 1968. New developments — myoelectric limbs, 3D-printed prosthetics, neural interfaces — continue today.
Made of
Modern prosthetic limbs use various materials. The Jaipur Foot uses rubber (vulcanised tyre rubber), wooden ankle blocks, and aluminium shanks. Western prosthetics often use carbon fibre, titanium, plastic. Sockets are usually made from polypropylene or other plastics. Some advanced limbs include electronic sensors and actuators.
Size
Varies by limb. A Jaipur Foot itself weighs about 850 grams (originally heavier; newer polyurethane versions are lighter). A complete below-knee prosthesis is roughly the same length as the missing leg. Above-knee prostheses are larger and include knee mechanisms.
Number of objects
Worldwide need is enormous. The WHO estimates that about 30-35 million people worldwide need prosthetic or orthotic devices. The Jaipur Foot organisation BMVSS alone has fitted over 1.45 million people in 27 countries. Many millions of others use Western or other prosthetic designs.
Where it is now
Used worldwide. The Jaipur Foot is fitted at 23 BMVSS centres in India and at fitting camps in Afghanistan, Iraq, Honduras, Nepal, Rwanda, Vietnam, Fiji, and many other countries. Western prosthetics are common in wealthier countries. Specialist sport and military prosthetics push the technological frontiers.
Before you teach this — reflect

Questions for you

  1. Most students may not have thought much about prosthetic limbs. How will you teach this respectfully, without sensationalism or pity?
  2. The Jaipur Foot is a story of Indian innovation. How will you credit it honestly without making it sound exotic?
  3. Disability and amputation can be sensitive topics. How will you handle them with appropriate gravity?

Common student difficulties — tick any you have noticed

Discovery sequence
1
Prosthetic limbs are not new. The oldest known prosthetic is a wooden toe found on the foot of an Egyptian mummy buried about 3,000 years ago. The toe is carefully shaped, with three pieces of wood held together by leather, and shows signs of wear — meaning the woman who wore it actually walked on it. Egyptian medical papyri describe surgeons making artificial body parts. Throughout history, people have made prosthetics. Roman soldiers had iron arms. Medieval European knights had elaborate hand prostheses with movable fingers operated by springs. Ambroise Paré, the great French surgeon of the 16th century, designed mechanical limbs for soldiers wounded in battle. American Civil War casualties (1861-1865) drove huge advances in American prosthetics. World War I and World War II both produced waves of prosthetic innovation. But for most of this history, prosthetics were expensive, heavy, uncomfortable, and limited. They worked best for people who could afford them, lived in pavement-and-chair societies, and accepted significant pain. Many amputees never got prosthetics at all. They used crutches, wheelchairs, or got around without aid. In the 1950s and 1960s, German and American manufacturers developed the Solid Ankle Cushioned Heel (SACH) foot — a standard prosthetic foot that was a major improvement on earlier designs. The SACH foot was used widely in wealthy countries. But the SACH foot was designed for Western life. Wear shoes. Sit on chairs. Walk on dry paving. The SACH foot could not bend enough to allow squatting. It could not be used barefoot. It got damaged in mud or water. The wood inside the foot would rot if wet. When Indian doctors tried to give SACH feet to Indian amputees in the 1960s, the prosthetics often ended up in cupboards. The patients went back to crutches. Why might a perfectly engineered Western prosthetic fail in India?
Points to consider (for the teacher)

Because design depends on who you design for. The SACH foot was designed for Western users, by Western engineers, in Western contexts. The designers were not thinking about squatting, cross-legged sitting, barefoot walking, or wet rice paddies. They had no reason to think about these things. Their users did not need to do them. But Indian users did. The mismatch between the prosthetic and the life of the user was total. Compare with other 'global standard' designs that fail outside their original context: medical equipment that needs constant electricity (a problem in much of the world); medicines that need refrigeration (a problem in tropical heat); educational software that assumes fast internet; agricultural tools that assume mechanised farming. The deeper point is that 'good design' is always design-for-someone. There is no universal good design. There is only design that fits its users' lives. The SACH foot was good design for some users. It was bad design for many others. Students should see that 'innovation' is not just about making something better in general. It is about making something better for specific people in specific contexts. End the discovery here.

2
Dr Pramod Karan Sethi was born in 1927 in Banaras (Varanasi), India. He trained as a surgeon, then specialised in orthopaedics — the branch of medicine that treats bones and joints. By the mid-1960s, he was head of the Orthopaedics Department at Sawai Man Singh Medical College in Jaipur, in the state of Rajasthan in northern India. Sethi spent much of his time treating amputees. India had many — from road accidents, from polio (a major problem before vaccination), from landmines along disputed borders, from diabetes complications, from untreated infections. The patients came to him hoping to walk again. Sethi was frustrated. The standard SACH feet from Germany and America did not work for his patients. He saw amputees give up on prosthetics. He saw them go back to crutches. He saw their lives diminished. In 1968, a craftsman called Ram Chandra Sharma approached Sethi with an idea. Sharma worked at the same hospital, making artificial limbs and other devices in a small workshop. He was not a doctor or an engineer. He was a sculptor with mechanical sense. He had been thinking about the problem. According to Sharma's later account, the inspiration came when he had a flat tyre on his bicycle. He was looking at the rubber tyre and noticed how flexible and durable it was. Why not make a prosthetic foot from rubber? Vulcanised tyre rubber was waterproof, flexible, cheap, and abundant in India. Sharma made a prototype. Sethi tested it on patients. They tweaked the design. Sharma cast moulds in sand — a traditional Indian craft technique used by many local sculptors. The design evolved. They added a wooden ankle block to give support. They surrounded the rubber and wood with a thin outer layer of tyre cord — like the cord inside a car tyre — for strength. After eighteen months, they had a working foot. It allowed dorsiflexion (bending up at the ankle). It allowed plantar flexion (bending down). It allowed enough side-to-side flex to permit squatting and cross-legged sitting. It was waterproof. It could be used barefoot. It looked enough like a real foot to fit inside a sandal. The first version cost about $5 in materials. They called it the Jaipur Foot, after their city. They did not patent it. Why might Sethi and Sharma not patent their invention?
Points to consider (for the teacher)

Several reasons. They wanted the foot to spread as widely and quickly as possible. They knew Indian amputees needed it urgently. Patent royalties would have raised the cost and slowed adoption. Their goal was not making money — it was helping amputees walk. The decision was unusual but principled. Other inventors have made similar choices. Jonas Salk did not patent the polio vaccine in 1955, saying 'Could you patent the sun?'. Tim Berners-Lee gave the World Wide Web away free in 1991. Denso Wave did not enforce the QR code patent in the 1990s (in another lesson in this collection). The pattern is clear: when invention is given away, it spreads. The Jaipur Foot has now reached over 1.45 million people in 27 countries — partly because no one had to pay royalties to use the design. The deeper point is that 'who profits from invention' is a real question. Some inventors patent and profit (which can fund more research). Some inventors give away and let the world benefit. Both choices are legitimate. Sethi and Sharma chose the second path. Students should see that 'gift to humanity' is sometimes the right answer for medical inventions in particular. The Jaipur Foot is one of the clearest examples. End the discovery here.

3
In 1975, a Jaipur businessman called Devendra Raj Mehta founded a charity called Bhagwan Mahaveer Viklang Sahayata Samiti (BMVSS — the Mahaveer Disabled Aid Society). Mehta had grown up around amputees and was inspired by the Jaipur Foot. The charity's purpose was simple: fit Jaipur Feet free of charge to anyone who needed them. The early years were slow. It took seven years to fit the first 50 limbs. Then the next seven years to fit 10,000. But the model worked. By the 1990s, BMVSS was fitting tens of thousands per year. Today, BMVSS has 23 centres across India and runs fitting camps in 27 countries worldwide. The model is simple. Patients arrive at a BMVSS centre. They are measured. A plaster cast is taken of their stump. A polypropylene socket is moulded to fit the stump exactly. The Jaipur Foot is attached to an aluminium shank (or, in later versions, a polypropylene shank). The whole prosthesis is fitted, adjusted, and given to the patient — often the same day. The patient walks out. Cost to the patient: zero. BMVSS funds itself through Indian and international donations. Stanford University, MIT, the Indian Institute of Technology, and the Indian Space Research Organisation all collaborate on research. Better materials, better fitting techniques, better outcomes. The foot has had famous users. The Indian actress and Bharatanatyam dancer Sudha Chandran lost her right leg in a road accident in 1981. She was fitted with the Jaipur Foot. She returned to professional dancing — performing classical Indian dance with the prosthetic. Her story inspired the 1984 Telugu film 'Mayuri' and the 1986 Hindi film 'Naache Mayuri', both starring Sudha as herself. Her example showed millions of Indians what prosthetics could enable. Beyond India, the Jaipur Foot has been used in war zones. The International Red Cross has used it to treat landmine victims in Afghanistan, Iraq, Cambodia, Angola, Mozambique, and other countries. The foot can be made locally, with local materials, by local craftspeople trained in BMVSS techniques. There are real limitations. The Jaipur Foot is heavier than carbon-fibre Western prosthetics. It is not suitable for high-level sport or rough terrain. It typically lasts 2-5 years before needing replacement. The lack of standardisation means quality varies. Stanford and MIT collaborations have addressed some of these issues. Why might a low-cost design succeed where expensive designs failed?
Points to consider (for the teacher)

Because cost matters when you are designing for billions. There are about 30-35 million people worldwide who need prosthetic limbs. Most of them live in countries where Western prosthetics are unaffordable. The Jaipur Foot at $50 reaches a market that the $12,000 Western foot cannot reach. The $12,000 foot may be technically superior in some ways. But it cannot help someone who cannot pay. The cheap foot, even with limitations, transforms more lives. The deeper point is that 'best' is contextual. The best prosthetic for an Olympic Paralympic athlete is a high-tech carbon-fibre design with sport-specific features. The best prosthetic for an Afghan farmer is something cheap, durable, waterproof, and locally repairable. The Jaipur Foot is best for many. The carbon-fibre foot is best for some. Both are real answers to real questions. Students should see that 'global health' is mostly about reaching the people other systems do not reach. The Jaipur Foot is one of the clearest examples of how thoughtful design can do this. End the discovery here.

4
Prosthetic technology continues to advance. Modern Western prosthetics include myoelectric limbs that respond to electrical signals from the user's residual muscles. The user thinks 'close hand' and the muscles fire signals, picked up by sensors, that move the artificial fingers. Some advanced prosthetics include sensory feedback — pressure sensors in the fingers connected to nerves in the residual arm, so the user can 'feel' through the prosthetic. 3D printing has transformed prosthetics for children. A child needs new prosthetics frequently as they grow. A traditional prosthetic for a child might cost thousands of dollars and last six months. A 3D-printed plastic prosthetic can be made for $50 and replaced as the child grows. Organisations like e-NABLE distribute open-source prosthetic designs that volunteers print on home 3D printers and donate to children worldwide. Neural interface prosthetics are an active research frontier. Implanted electrodes pick up signals directly from the user's brain or spinal cord, allowing very fine control of artificial limbs. The DEKA Arm, developed by inventor Dean Kamen, is one of the most advanced. It can perform delicate tasks — picking up a grape, peeling a banana, turning a key. Paralympic sport prosthetics push design to extremes. Sprinters use carbon-fibre 'blade' prosthetics shaped like cheetah legs. Some swimmers use water-specific prosthetics. Some climbers use specialist climbing limbs. The South African sprinter Oscar Pistorius famously used blade prosthetics in the able-bodied 2012 Olympic Games — though his case is now overshadowed by his 2013 conviction for killing his girlfriend. The Jaipur Foot continues to evolve. Newer versions use polyurethane instead of rubber, making the foot lighter (under 600 grams instead of 850). Stanford University has developed a 'Stanford-Jaipur knee' for above-knee amputees, using high-density plastic rather than expensive titanium. The collaboration with the Indian Space Research Organisation has improved the foot's flex characteristics. Prosthetic users today have more choices than ever. Western users can sometimes choose between Jaipur-style designs (cheap, durable, comfortable) and high-tech designs (fitness-focused, energy-returning, computerised). Choice is itself a privilege. What is the prosthetic limb today?
Points to consider (for the teacher)

A field with many traditions and approaches. The Jaipur Foot serves people who need affordable, durable, locally repairable prosthetics for everyday life. High-tech Western prosthetics serve people who can afford them and need specialised functions. 3D-printed prosthetics serve children and emergency situations. Neural-interface prosthetics push the frontiers of what is possible. Each approach has its place. The deeper point is that 'prosthetic technology' is not one technology. It is many technologies serving many users. The most expensive is not always the best. The cheapest is not always second-best. The right prosthetic for a user depends on their life, their needs, their resources, their context. The Jaipur Foot taught the prosthetic world this lesson. Western designers now think much more carefully about design context than they did before 1968. The Indian insight has reshaped global prosthetic practice. Students should see that 'innovation' includes innovation in approach, not just in technology. The Jaipur Foot's main innovation is not just the materials — it is the principle that prosthetics should be designed for the user's actual life. End the discovery here. Right now, somewhere in India, a BMVSS team is fitting another Jaipur Foot. The amputee will walk out with a leg that lets them squat, work, and pray. Sethi and Sharma's gift continues.

What this object teaches

A prosthetic limb is an artificial body part that replaces a missing limb. Prosthetics have existed for at least 3,000 years — the oldest known is an ancient Egyptian wooden toe — but most of human history has known limited, expensive, uncomfortable prosthetics. The modern field developed in 16th-century Europe with limb-makers serving wounded soldiers. The American Civil War, World War I, and World War II all drove waves of prosthetic innovation. The standard Western prosthetic foot, the Solid Ankle Cushioned Heel (SACH), was developed in the 1950s-60s. But the SACH foot did not work in India and other countries where users needed to squat, sit cross-legged, walk barefoot, and work in muddy fields. In 1968, two men in Jaipur, India — orthopaedic surgeon Dr Pramod Karan Sethi and craftsman Ram Chandra Sharma — invented the Jaipur Foot. Made of vulcanised rubber, wood, and aluminium, costing about $50 (compared with $12,000 for Western prosthetics), the Jaipur Foot allowed users to squat, walk barefoot, and work in mud. They did not patent the design. The Bhagwan Mahaveer Viklang Sahayata Samiti (BMVSS) charity, founded in 1975, has fitted over 1.45 million Jaipur Feet in 27 countries, mostly free of charge. Famous users include Indian dancer Sudha Chandran, whose return to dancing inspired hit Indian films. The Jaipur Foot has been used in war zones (Afghanistan, Iraq, Cambodia, Angola). Time magazine called it one of the great inventions of the 20th century. Modern prosthetic technology continues to advance — myoelectric limbs, 3D-printed prosthetics for children, neural-interface devices, Paralympic sport blades. The Jaipur Foot taught the field a key lesson: the right prosthetic depends on the user's life and context, not just on technology.

DateEventWhat changed
around 1000 BCEAncient Egyptian wooden toe (oldest known prosthetic)Prosthetic limb tradition begins
1500s-1600sEuropean mechanical limbs (Ambroise Paré)Modern prosthetic engineering begins
1860sAmerican Civil War drives innovationMass production of prosthetics; new attachment methods
1914-1945World Wars produce waves of amputeesProsthetics become more comfortable and varied
1956SACH foot developed in Germany/USAStandard Western prosthetic foot for decades
1968Sethi and Sharma develop the Jaipur FootIndian-designed alternative for non-Western contexts
1975BMVSS charity foundedFree distribution begins; tradition of giving Jaipur Feet without charge
1981Sethi receives Magsaysay Award and Padma ShriInternational recognition of the Jaipur Foot's importance
1990s onwardsCarbon fibre, myoelectric, 3D-printed prostheticsHigh-tech advances alongside the Jaipur Foot tradition
TodayOver 1.45 million Jaipur Feet fittedContinuing global impact
Key words
Jaipur Foot
A rubber-based prosthetic foot designed in 1968 in Jaipur, India, by Dr P.K. Sethi and Ram Chandra Sharma. Costs about $50 to make. Allows users to squat, sit cross-legged, walk barefoot, and work in mud. Over 1.45 million have been fitted worldwide.
Example: The Jaipur Foot's outer layer is made of vulcanised rubber — the same material used in tyres. The inner core has wooden ankle blocks for support. The whole design is waterproof and can be made by local craftspeople trained in BMVSS techniques.
Dr Pramod Karan Sethi
Indian orthopaedic surgeon (1927-2008) who co-invented the Jaipur Foot with Ram Chandra Sharma in 1968. Awarded the Magsaysay Award (1981) and the Padma Shri (1981). Continued working on prosthetics and disability rehabilitation throughout his career.
Example: Sethi was head of the Orthopaedics Department at Sawai Man Singh Medical College in Jaipur. He saw firsthand that Western prosthetics did not work for Indian amputees. The Jaipur Foot was his response to this real-world problem.
Ram Chandra Sharma
Indian craftsman who co-invented the Jaipur Foot with Dr P.K. Sethi in 1968. According to legend, the rubber-foot idea came to him after a flat tyre on his bicycle. Created the original sand-cast moulds used to manufacture the foot.
Example: Sharma's contribution to the Jaipur Foot is sometimes underrecognised because he was not a doctor or formally trained engineer — he was a sculptor and tinkerer. His practical sense for materials and shapes was essential to making the foot work.
BMVSS
Bhagwan Mahaveer Viklang Sahayata Samiti, the charity founded in 1975 in Jaipur, India, that distributes Jaipur Feet free of charge. Has fitted over 1.45 million amputees in 27 countries. Has 23 centres in India and runs fitting camps worldwide.
Example: BMVSS funds itself through donations from Indian and international supporters. The charity also collaborates with Stanford University, MIT, the Indian Institute of Technology, and the Indian Space Research Organisation on research and development.
SACH foot
The Solid Ankle Cushioned Heel foot, the standard Western prosthetic foot developed in the 1950s. Made of wood and rubber. Effective for shoe-wearing, chair-using populations but unsuitable for users who need to squat, walk barefoot, or work in mud.
Example: The SACH foot was the prosthetic Indian doctors initially tried to fit Indian amputees. When it repeatedly failed in Indian contexts, this experience led directly to the development of the Jaipur Foot as an alternative.
Sudha Chandran
Indian Bharatanatyam dancer and actress (born 1965) who lost her right leg in a road accident in 1981. Was fitted with the Jaipur Foot and returned to professional dancing. Her story inspired the 1984 Telugu film 'Mayuri' and the 1986 Hindi film 'Naache Mayuri'.
Example: Chandran's example was hugely important in India. Many amputees had given up on prosthetics. Seeing a famous dancer perform with one changed minds. She continues to act in Indian films and television today, and is a recognised advocate for disability rights.
Use this in other subjects
  • History: Build a class timeline: Egyptian wooden toe (around 1000 BCE), Roman iron arms, Ambroise Paré (1500s), American Civil War (1860s), World Wars (1914-1945), SACH foot (1956), Jaipur Foot (1968), modern myoelectric and 3D-printed prosthetics. The story spans 3,000 years.
  • Science: A Jaipur Foot uses vulcanised rubber — rubber treated with sulphur to make it durable and elastic. Discuss: what is vulcanisation? Why does it make rubber stronger? The same chemistry is used in car tyres. Vulcanisation was discovered by Charles Goodyear in 1839 — a key innovation that made the Jaipur Foot possible.
  • Citizenship: The Jaipur Foot is given free through the BMVSS charity. Discuss: should medical care be free? What about prosthetics, eyeglasses, hearing aids? The principle of 'medical equipment as a human right' is debated worldwide. India and BMVSS have made one important answer.
  • Ethics: Sethi and Sharma did not patent the Jaipur Foot. They could have made millions of dollars in royalties. They chose to give the design freely. Discuss: when should inventors give away their work? Compare with Jonas Salk (polio vaccine, not patented), Tim Berners-Lee (World Wide Web, given freely), Denso Wave (QR code, patent not enforced).
  • Art: The Jaipur Foot looks like a real foot — it can fit inside a sandal. Discuss: why does prosthetic appearance matter? How is this different from the look of high-tech blade prosthetics worn proudly by Paralympic athletes? Different users want different aesthetics. Both 'realistic' and 'visibly mechanical' are valid choices.
  • Geography: The Jaipur Foot has been used in 27 countries — Afghanistan, Iraq, Vietnam, Cambodia, Angola, Mozambique, Honduras, Rwanda, Fiji, Nepal, and many others. On a class map, mark the countries. Discuss: what do they have in common? Mostly: poor, post-conflict, with many landmine survivors. The Jaipur Foot's reach matches the world's needs.
Common misconceptions
Wrong

Prosthetic limbs are a modern invention.

Right

Prosthetic limbs have existed for at least 3,000 years. The oldest known is a wooden toe from ancient Egypt. Roman, medieval, and 19th-century prosthetics all existed. The modern field began in 16th-century Europe. The Jaipur Foot dates from 1968.

Why

Treating prosthetics as 'modern' erases millennia of human invention.

Wrong

The most expensive prosthetic is the best.

Right

The right prosthetic depends on the user's life. A $12,000 Western prosthetic is best for some users. A $50 Jaipur Foot is best for users who need to squat, walk barefoot, or work in mud. The Jaipur Foot has reached over 1.45 million people; the expensive ones reach far fewer. Reach matters.

Why

'Most expensive = best' is a common assumption that fails in real-world design.

Wrong

India relies on Western technology.

Right

India has invented major medical and scientific technologies that the world has adopted. The Jaipur Foot is one of the most striking examples. Indian Space Research Organisation, Indian Institutes of Technology, and many Indian researchers contribute to global knowledge. M-Pesa-style innovation also exists in India.

Why

'Western invents, world adopts' is often wrong. India has been a major source of innovation for centuries.

Wrong

Disability is mostly about pity and inability.

Right

People with disabilities, including amputees, lead full lives — work, dance, parent, lead, create. The right prosthetic, the right environment, and the right social attitudes make this possible. Sudha Chandran continued her dance career. Sethi and Sharma's invention has helped millions live actively. Disability is partly about technology and social design, not just about the body.

Why

Pity-based framings of disability are disrespectful and inaccurate.

Teaching this with care

Treat the prosthetic limb topic with appropriate care. People with amputations and other disabilities deserve respect, not pity. Use 'amputee' or 'person with an amputation' as preferred. Pronounce 'prosthetic' as 'pross-THET-ik'; 'Jaipur' as 'JY-poor'; 'Sethi' as 'SET-hee'; 'Sharma' as 'SHAR-mah'; 'BMVSS' by letter or 'Bhagwan Mahaveer Viklang Sahayata Samiti'; 'Sudha Chandran' as 'SOO-dah CHAN-dran'. Be careful to credit Indian innovation properly. The Jaipur Foot is one of the world's most important medical inventions of the 20th century. Western coverage often credits 'Indian help' or 'Indian charity' rather than 'Indian invention'. The proper framing is that this is Indian medical engineering. Be aware that some students may have personal experience of amputation or disability. Approach the topic with sensitivity. Avoid graphic descriptions of how amputations occur. Focus on what prosthetics enable, not on what amputees lack. Be aware that landmines are still a real problem in many countries. Cambodia, Afghanistan, Angola, and others have ongoing landmine victim populations. The Jaipur Foot has been crucial in these contexts. Mention this honestly without sensationalism. Be careful with the Sudha Chandran story. She is a real living person and a public figure. Her story is inspiring and accurate. But avoid 'inspiration porn' framings — treating disabled people as inspirational simply for living. Chandran is a great dancer and actress who happens to have an amputation, not 'an inspirational disabled person'. Be respectful of the various traditions of prosthetic care. Different communities prefer different approaches — some want 'realistic' prosthetics, some want visible high-tech ones, some prefer crutches or wheelchairs. All are valid choices. If you have students of Indian heritage, give them space to share. Many will know about the Jaipur Foot. Some may have family connections to disability or rehabilitation. Respect their expertise. Avoid framing the Jaipur Foot as 'cheap because India is poor'. Frame it as 'designed appropriately for users who include billions of people in tropical, agricultural, religious, and traditional contexts'. The design is a positive choice, not a compromise. End the lesson on the present. The Jaipur Foot is being fitted today. The technology continues to develop. The story is alive.

Check what students have understood

Answer each question in one or two sentences. Use what you have learned about the prosthetic limb.

  1. Who invented the Jaipur Foot, and when?

    Dr Pramod Karan Sethi (an Indian orthopaedic surgeon) and Ram Chandra Sharma (a craftsman) at Sawai Man Singh Medical College in Jaipur, India. They invented it in 1968 after eighteen months of trial and error. According to legend, the rubber-foot idea came to Sharma after he had a flat tyre on his bicycle.
    Marking note: Award full marks for any answer that names both inventors and gives the date and place.

  2. What can the Jaipur Foot do that Western prosthetics cannot?

    It allows users to squat, sit cross-legged on the floor, walk barefoot, and work in mud or water. These actions are essential in Indian and many other cultures but were not possible with the standard Western SACH prosthetic foot. The Jaipur Foot is also waterproof, durable in tropical climates, and can be made locally with local materials.
    Marking note: Strong answers will name at least three specific actions and explain why these matter.

  3. How much does the Jaipur Foot cost compared with Western prosthetics?

    The Jaipur Foot costs about $50 to make, compared with about $12,000 for an equivalent Western prosthetic. The dramatic cost difference is one of the main reasons it has reached over 1.45 million amputees in 27 countries — most of them through the BMVSS charity, which provides the foot free of charge.
    Marking note: Award full marks for any answer that gives the rough cost comparison and recognises the impact on accessibility.

  4. Why did Sethi and Sharma not patent their invention?

    They wanted the Jaipur Foot to spread as widely and quickly as possible. They knew Indian amputees needed it urgently and could not afford patent royalties. Their goal was to help amputees walk, not to make money. The unpatented design has now reached over 1.45 million people partly because no one has had to pay royalties to use it.
    Marking note: Strong answers will explain both the practical reason (cost) and the principled reason (desire to help).

  5. How is the Jaipur Foot used outside India?

    The BMVSS charity has run fitting camps in 27 countries, mostly in conflict zones and developing countries — Afghanistan, Iraq, Cambodia, Angola, Mozambique, Honduras, Rwanda, Fiji, Nepal, Vietnam, and many others. The International Red Cross has also used it for landmine victims. Local craftspeople are trained in BMVSS techniques to make the foot from local materials.
    Marking note: Award full marks for any answer that mentions multiple countries and the focus on conflict zones or developing countries.
Discuss together

These questions have no single right answer. Talk in pairs or small groups, then share your ideas with the class.

  1. The Jaipur Foot is sometimes called 'appropriate technology'. What does this mean, and why does it matter?

    Push students to think about technology and context. 'Appropriate technology' is a movement that emphasises designing technology to fit the actual conditions of the people who will use it — including their economic resources, materials available locally, climate, culture, and physical environment. The Jaipur Foot is a classic example: cheap, made of locally available materials (rubber, wood), suited to tropical climate, suited to barefoot/squatting cultures. Compare with other appropriate technology examples — solar lanterns (in another lesson in this collection), M-Pesa (also in this collection), bicycle ambulances. The deeper point is that 'most advanced' is not always 'best'. Sometimes the right technology for a job is simple and durable rather than complex and fragile. End by asking what 'appropriate technology' might look like for problems in students' own communities.

  2. Sethi and Sharma did not patent their invention. Was this a wise decision?

    This is a question about innovation, profit, and benefit. Arguments for not patenting: it allowed the design to spread widely and quickly; it kept the foot affordable; it benefited millions of amputees who could not have paid royalties. Arguments for patenting: it could have funded more research; it could have prevented poor-quality counterfeits; it could have rewarded the inventors financially. Strong answers will see that medical inventions raise particular ethical questions. Compare with Jonas Salk (polio vaccine, not patented; he said 'Could you patent the sun?'); Tim Berners-Lee (World Wide Web, given freely); Denso Wave (QR code, patent not enforced — see another lesson). The pattern is clear: in many cases, gift-economy inventions reach further than patent-protected ones. End by asking what other recent inventions students think should be given freely.

  3. The Jaipur Foot taught Western prosthetic designers to think about user context. What other technologies might be designed badly because designers do not think about real users?

    This is a creative question. Students may suggest: medical equipment that needs constant electricity (a problem in much of the world); medicines that need refrigeration; smartphones that assume good vision and fine motor control; school furniture designed for a 'standard' body; cars designed for crash tests using only male dummies. The deeper point is that 'good design' depends on knowing your users. When designers assume the user is like themselves, the design fails for users who are not like the designers. The Jaipur Foot is one of the world's clearest examples of how thinking about real users — Indian farmers, traditional sitters, barefoot walkers — produced a better design. Strong answers will see this principle as widely applicable. End by asking how students think their own school, neighbourhood, or community could be redesigned to fit its actual users better.
Teaching sequence
  1. THE HOOK (5 min)
    Without saying anything about the lesson, ask: 'How much do you think a basic prosthetic leg costs?' Take guesses (most will undershoot the Western price). Then say: 'In the West, around $12,000. In India, around $50. The Indian one has helped over 1.5 million people. The expensive one has not. We are going to find out why.'
  2. INTRODUCE THE OBJECT (10 min)
    Describe the Jaipur Foot: rubber and wood, designed in 1968 in India, costs $50, allows squatting and walking barefoot. Pause and ask: 'Why might $50 be more useful than $12,000 for many users?' Listen to answers. Lead them to ideas about reach, accessibility, and design context.
  3. THE STORY OF SETHI AND SHARMA (15 min)
    Tell the story: Indian doctor frustrated by failing Western prosthetics; craftsman with the rubber idea; eighteen months of trial and error; the choice not to patent. Discuss: why might this story not be widely known in the West? Connect to other examples of unpatented inventions — polio vaccine, World Wide Web, QR code (in another lesson).
  4. REACH AND IMPACT (10 min)
    Tell about BMVSS, the charity model, the 1.45 million people in 27 countries, the use in war zones. Tell the Sudha Chandran story — dancer who returned to performance with the foot, inspired Indian films. Discuss: how does technology change what disability looks like?
  5. CLOSING (5 min)
    Ask: 'What does the Jaipur Foot teach us about innovation, design, and reaching real users?' Take a few honest answers. End by saying: 'Right now, in Jaipur and in fitting camps around the world, BMVSS teams are making more Jaipur Feet. Each one helps someone walk. Each one was made possible by two men who decided in 1968 to design for their users instead of importing a design that did not fit. The simplest principle made the biggest difference. Now you know.'
Classroom materials
Design Your Own Solution
Instructions: In small groups, students pick a problem they see in their school or community — perhaps something a friend struggles with, perhaps something they have noticed about a building or service. They design a 'Jaipur-style' solution: cheap, made of locally available materials, suited to actual users. Each group presents their idea. Discuss: how do you design for the people who will use something?
Example: In Mr Patel's class, students designed: a lower water fountain for younger children, a quieter classroom area for students who get overwhelmed, a community library cart for blocks of flats without easy book access. The teacher said: 'You have just done what Sethi and Sharma did. You started with real users, real needs, real local materials. The Jaipur Foot is one of the world's most successful examples of this approach. Yours might not reach 1.5 million people, but the principle is the same.'
Map of Need
Instructions: On a class map of the world, mark the 27 countries where the Jaipur Foot has been distributed. Discuss: what do these countries have in common? Many are post-conflict (Afghanistan, Iraq, Cambodia, Angola). Many are in tropical climates. Many have populations who sit on the floor, work in fields, walk barefoot. The Jaipur Foot's reach matches the world's actual needs.
Example: In Mrs Singh's class, students realised the Jaipur Foot has reached countries that Western prosthetics rarely reach. The teacher said: 'You are looking at a map of where appropriate technology helps the most. The Jaipur Foot has gone to landmine victims in Cambodia, war casualties in Afghanistan, accident survivors in Honduras. The technology is Indian. The need is global. The match is what makes it work.'
Free or Patented?
Instructions: In small groups, students discuss: 'Should medical inventions be patented? When should inventors give their work away freely?' Examples to consider: Jonas Salk (polio vaccine, not patented); the inventors of insulin (sold the patent for $1); Sethi and Sharma (Jaipur Foot, not patented); modern pharmaceutical companies (heavily patented). Each group shares one position. Discuss: medical ethics around invention is genuinely contested.
Example: In one class, students debated and could not reach consensus. The teacher said: 'You have just had the same debate that medical inventors have. There is no perfect answer. Patenting can fund research and prevent poor copies. Free distribution can save lives that would otherwise be lost. Each invention's right path depends on context. The Jaipur Foot's path was the right one for its inventors and its users. Other inventions might justify other choices. Thinking carefully about this is part of being a thoughtful citizen.'
Where to go next
  • Try a lesson on the wheelchair for another mobility tool with deep social meaning.
  • Try a lesson on Braille for another tool that gives access to people with disabilities.
  • Try a lesson on M-Pesa for another example of innovation from outside the rich-country mainstream.
  • Connect this lesson to history class with a longer project on disability and society. The treatment of amputees and disabled people has changed dramatically over the past 100 years.
  • Connect this lesson to design class with a longer project on appropriate technology. The principle applies far beyond prosthetics.
  • Connect this lesson to citizenship class with a longer discussion of medical ethics. Patents, costs, access, and global health are all real ongoing issues.
Key takeaways
  • A prosthetic limb is an artificial body part that replaces a missing limb. Prosthetics have existed for at least 3,000 years, with the oldest known being an ancient Egyptian wooden toe.
  • The Jaipur Foot was developed in 1968 in Jaipur, India, by orthopaedic surgeon Dr P.K. Sethi and craftsman Ram Chandra Sharma. It is made of vulcanised rubber, wood, and aluminium. It costs about $50 to make.
  • The Jaipur Foot allows users to squat, sit cross-legged, walk barefoot, and work in mud — actions that Western prostheses do not allow. This was crucial for users in India and similar contexts.
  • Sethi and Sharma did not patent the Jaipur Foot. They gave the design freely to anyone who wanted to make it. The decision allowed the foot to spread widely and quickly.
  • The BMVSS charity, founded in 1975, has fitted over 1.45 million Jaipur Feet to amputees in 27 countries — mostly free of charge. The foot has been used in war zones (Afghanistan, Iraq, Cambodia, Angola), among landmine victims, and after natural disasters.
  • The Jaipur Foot taught the global prosthetic world a key lesson: the right prosthetic depends on the user's actual life and context, not just on technology. Time magazine called it one of the great inventions of the 20th century.
Sources
  • The Jaipur Foot and the Jaipur Prosthesis — Rakesh Bhargava (2019) [academic]
  • Revolutionizing Rehabilitation: The Legacy of Dr. Pramod Karan Sethi — Mitul Saha and Sonali G Choudhari (2024) [academic]
  • Jaipur Foot: The Low-Cost Prosthetic — Science Museum, London (2017) [institution]
  • BMVSS Annual Report — Bhagwan Mahaveer Viklang Sahayata Samiti (2024) [institution]
  • The Jaipur Foot — IEEE Pulse (2022) [news]