All Object Lessons
Everyday Objects

The Tortilla Machine: A 3,500-Year-Old Food Goes Industrial

⏱ 45 minutes 🎓 Primary & Secondary 📚 history, science, ethics, citizenship, art
Core question What changes when a food that has been made by hand for 3,500 years starts being made by machine — and what is gained, what is lost, and who decides?
A tortilla machine in a small workshop. Designs like this, first patented in 1947 by Fausto Celorio Mendoza, transformed how Mexico eats and changed the lives of millions of women. Photo: Unknown / Wikimedia Commons / CC BY 2.0
Introduction

In a small shop somewhere in Mexico, a machine hums. A worker pours soft yellow corn dough into a hopper at one end. The dough flows between two rollers and comes out as a thin sheet. A cutter punches the sheet into round discs. The discs travel along a metal belt through a long gas oven. At the other end, hot tortillas fall into a stack. One tortilla every second. All day long. People come from the neighbourhood with cloths and bags to buy their daily tortillas. This is a tortilladora — a tortilla machine. There are more than 100,000 of them in Mexico today. Most Mexicans eat the tortillas that come out of one. For 3,500 years before this machine existed, every tortilla in Mexico was made by hand. The corn was soaked in lime water (a process called nixtamalisation, invented in ancient Mesoamerica). It was ground on a stone metate. The dough was patted into rounds between the palms of the hands. The rounds were cooked on a hot clay griddle called a comal. This work was done almost entirely by women. A family of six needed perhaps 50 tortillas a day. Making them by hand took several hours. Then in 1947, a Mexican inventor named Fausto Celorio Mendoza built a machine that could press, cut, and cook tortillas automatically. At first, he sold the machines quietly. He was afraid that the women who made tortillas by hand for a living would be angry. By the 1950s he was selling more. By the 1980s, hand-made tortillas had become rare in cities. The machine had won. This lesson asks what changed. The food is the same, mostly. The people are the same. But the work, the family meal, the role of women, the place of the tortilla in Mexican life — all of these shifted when the machine arrived. Some things were gained. Some things were lost. The story is still being lived out today.

The object
Origin
Mexico. The hand tortilla goes back at least 3,500 years in Mesoamerica. The mechanical tortilla machine was developed by Mexican inventors in the early to mid-20th century, with the breakthrough design patented by Fausto Celorio Mendoza in 1947.
Period
Early machines patented from 1904 onwards. The Celorio machine of 1947 became the standard. Improvements in 1959 and 1963 made the machines fast, cheap, and easy to maintain. By the 1980s, tortilla machines were used in nearly every Mexican neighbourhood.
Made of
Steel for the frame and rollers, aluminium for parts that touch the dough, a gas burner for heat, a small electric motor for the belt. Some modern machines add electronic controls. The materials are simple and easy to repair.
Size
A typical small-shop machine is about 2 metres long, 1 metre wide, and 1.5 metres tall. It weighs 200 to 400 kilograms. Large industrial machines are much bigger and can produce 200 kilograms of tortillas per hour.
Number of objects
More than 100,000 tortilla machines made by Celorio's company alone are in use today. The full number worldwide is many times higher, including machines from other Mexican manufacturers and copies made in many countries.
Where it is now
Used in 'tortillerías' (tortilla shops) in nearly every Mexican neighbourhood, in many Mexican-American communities in the United States, and increasingly in other countries. Also used in homes by small machines for personal use.
Before you teach this — reflect

Questions for you

  1. The tortilla is one of the world's most important foods, and it has a 3,500-year history. How will you teach the food with respect, and avoid making it seem like just a Mexican curiosity?
  2. The machine freed millions of women from hours of daily labour, but it also took away their work and their craft. How will you discuss this fairly?
  3. Industrial food is often criticised today. How will you handle this without dismissing the real benefits the machine brought to poor families?

Common student difficulties — tick any you have noticed

Discovery sequence
1
Imagine making bread every day for your family. Not buying it. Making it. From raw grain. By hand. For your whole life. For 3,500 years, this is what tortilla-making was. Every morning before sunrise, women in Mesoamerican households began the work. Corn that had been soaked overnight in water with calcium hydroxide (lime) — a process called nixtamalisation — was ground on a stone slab called a metate. The grinding alone took an hour or more. The resulting dough (masa) was patted by hand into thin rounds. Each round was placed on a hot clay griddle (comal) to cook for a minute on each side. The first tortillas were ready by breakfast. More were made through the day. A family of six might eat 50 tortillas a day, sometimes more. Why did this work fall almost entirely on women?
Points to consider (for the teacher)

For reasons that go back deep into Mesoamerican history. Maize was sacred — the Popol Vuh, the foundational Maya text, says humans were made from maize dough. Preparing maize for the family was seen as central women's work, tied to giving life. But it was also brutal labour. Estimates from anthropologists suggest that a Mesoamerican woman might spend 5 to 6 hours a day on tortilla-making alone, on top of all her other work. This continued for centuries. In rural Mexico in the 1940s, before the machine, women still spent many hours a day making tortillas. The work shaped their bodies — the kneeling position at the metate caused specific bone changes that archaeologists can see in ancient skeletons. The work shaped their lives — much of their day was taken by this single task. Students should see that 'tradition' is not always gentle. The hand-made tortilla carried thousands of years of culture, and it also carried thousands of years of women's exhausting labour. Both things are true. Holding them both in mind is the start of thinking honestly about what the machine changed.

2
The tortilla machine did not come from nothing. The first patents for tortilla-making machines were filed in Mexico as early as 1859 — by an inventor called Julián González, who imported designs to grind corn and shape dough. Real industrial machines came in 1904, with patents by Everardo Rodríguez Arce and Luis Romero, but these early machines did not work well. A series of inventors tried, failed, and tried again over the next 40 years. The breakthrough came in 1947 with Fausto Celorio Mendoza, born in Veracruz, who built a machine that pressed dough into round flats and carried them through gas ovens on a metal belt. It could make one tortilla per minute. By 1963, with help from engineer Alfonso Gándara, the design had improved to make 132 kilograms of tortillas per hour. The machines became affordable for small shops. Why did Celorio sell his early machines quietly?
Points to consider (for the teacher)

Because he feared the women who made tortillas by hand. In Mexican cities and towns of the 1940s and 1950s, hand tortilla-making was the work of tens of thousands of poor women — some sold from their homes, some on the streets, some in small markets. Celorio's machine threatened their livelihoods. He was afraid they would protest, or attack his machines, or attack him. His early sales were modest — perhaps one machine a month in the early 1950s. By the 1960s, neighbourhood tortillerías using his machines were spreading, and the home tortilla trade was shrinking. By the 1980s, in Mexican cities, most families bought rather than made their tortillas. Students should see two things. First, technology that helps some people often hurts others. Second, the people who lose are often the ones with the least power to resist. The Mexican women who made tortillas by hand for income lost their work to the machine. Their loss was real, even though the machine also freed many other women from hours of unpaid family labour. Both stories are true, and the lesson should hold them both.

3
What does a tortilla machine actually do? It does the same five steps a woman did by hand. (1) It pours nixtamalised corn dough — bought already prepared from a separate factory — into a hopper. (2) It rolls the dough between two cylinders into a thin sheet. (3) A round cutter stamps the sheet into discs, with the leftover dough recycled back to the hopper. (4) The discs travel along a metal belt through a long gas oven that cooks them on both sides. (5) The finished tortillas drop into a stack at the other end. A single machine in a neighbourhood shop can make 30 to 50 kilograms of tortillas per hour. Many machines run for 8 hours a day. A typical Mexican neighbourhood tortillería sells tortillas hot, by weight, to local families who come with cloths or bags. Customers eat them within hours, just as their grandmothers would have. But something has changed. What is the same, and what is different?
Points to consider (for the teacher)

The same: the basic recipe (nixtamalised corn, ground, cooked thin), the shape, the cultural place at every meal, the freshness — most Mexicans still eat their tortillas hot from the day's batch. The different: the labour (machine, not hands), the producer (small shopkeeper, not family woman), the variation (uniform machine product, not the slight differences between one cook's tortillas and another's), the corn (now usually a special industrial variety bred for machine processing), and increasingly the masa itself (often made from dehydrated masa flour like Maseca, not from corn the cook nixtamalised herself). Some of these changes are small. Others are large. The hardest one to measure is what Mexicans call 'sazón' — a word that means roughly 'the seasoning hands give to food'. Hand-made tortillas vary a little from one cook to another, and many Mexicans say they taste the difference. Machine tortillas are uniform. They are also fresh, cheap, and available without hours of labour. Most Mexicans today eat machine tortillas. Many also feel something is gone. Students should see that 'progress' is rarely simple. Things are gained. Other things are lost. The question is whether the gains are worth the losses, and who gets to decide. In the case of the tortilla machine, the deciders were mostly the women who chose, year by year, to buy rather than make. The choice spread because it was a real relief from real work.

4
Today, tortilla machines are everywhere. More than 100,000 Celorio machines are in use. Many more come from other Mexican companies and from copies built in other countries. In the United States, where Mexican-American communities have grown, the tortilla is now the second-best-selling packaged bread product after sliced white bread. Tortillas are also made and sold in India, in parts of the Middle East, in parts of Africa, and across Latin America. Not everyone is happy with all of this. There is a movement in Mexico, called the 'tortilla artesanal' (artisanal tortilla) movement, that is trying to bring back hand-made tortillas using traditional corn varieties. They argue that the machine industry has done damage — to traditional corn varieties (most machine masa now comes from a few industrial varieties), to nutrition (industrial masa is often less rich in nutrients than traditional), and to culture (the daily ritual of hand-tortilla-making has nearly disappeared in cities). Some good restaurants in Mexico City now use hand-made tortillas as a sign of quality. What is the future of the tortilla?
Points to consider (for the teacher)

Probably both. The machine tortilla will continue to feed most Mexicans most of the time — it is cheap, fresh, and available in every neighbourhood. The hand tortilla will continue to exist for those who can afford it or who choose to make their own. Some rural communities still use the metate every day. Some urban Mexicans buy hand-made tortillas at weekend markets. Industrial corn varieties dominate, but Mexico still grows hundreds of traditional varieties, some thanks to the work of organisations protecting them. The story is not closed. The tortilla is still a living food, with millions of people making decisions every day about how it should be made. The machine was a turning point. It was not the ending. Students should see that food traditions are not fixed objects in a museum. They are practices that real people make and remake every day. The future of the tortilla is being decided right now, by the people who eat them.

What this object teaches

A tortilla machine (tortilladora) is a device that automatically presses, cuts, and bakes corn tortillas. Modern machines were developed by Mexican inventors in the early to mid-20th century, with the breakthrough design patented by Fausto Celorio Mendoza in 1947. Before this, every tortilla in Mexico was made by hand — almost entirely by women, in a process that took hours every day. Tortillas themselves are a 3,500-year-old food, based on nixtamalisation, an ancient Mesoamerican technique of soaking corn in lime water that was developed by 1500 BCE. The machine spread rapidly through Mexico from the 1950s onwards. By the 1980s, most urban Mexicans bought their tortillas from neighbourhood shops rather than making them at home. The machine freed women from hours of daily labour, made tortillas cheaper and more available, but also reduced traditional varieties of corn, changed the taste, and ended a deep cultural practice that had defined Mexican households for thousands of years. Today the tortilla is the second-best-selling packaged bread product in the United States. A small movement is bringing back hand-made tortillas as a sign of quality. The story of the machine is a story of what happens when an ancient food meets modern industry.

QuestionHand tortillaMachine tortilla
Who makes it?A woman in the household, usually for several hours a dayA machine in a neighbourhood shop, run by a few workers
How long does it take?A family of six needs 3 to 5 hours of work per dayA few seconds per tortilla, with one shop making thousands per day
What corn is used?Many traditional varieties — different colours, flavours, and texturesMostly one or two industrial varieties bred for machines
How does it taste?Varies by cook — some Mexicans say better, with the cook's 'sazón'More uniform — fresh but less varied
How much does it cost?Many hours of unpaid family labour, often by womenA few pesos per kilogram — affordable for almost any family
Where does it fit in daily life?A defining household ritual, often tied to women's identityA bought good, like bread from a bakery
Key words
Tortilla
A thin round flatbread made from corn or, sometimes, wheat. Corn tortillas are the original kind, eaten in Mesoamerica for over 3,500 years. They are the daily bread of most Mexicans and many other Latin Americans.
Example: A typical Mexican might eat 5 to 10 tortillas a day — at breakfast with eggs, at lunch wrapped around meat or beans, at dinner alongside soup or stew.
Nixtamalisation
An ancient Mesoamerican technique of soaking and cooking corn in an alkaline solution (usually water with calcium hydroxide, called 'cal' or lime). It softens the corn, makes it easier to grind, and unlocks important nutrients (especially niacin, vitamin B3) that would otherwise be unavailable.
Example: The word comes from Nahuatl: 'nextli' (lime ashes) plus 'tamalli' (cooked dough). The technique was developed on the Pacific coast of Guatemala by about 1500 BCE.
Masa
The dough made from nixtamalised, ground corn. The base ingredient for tortillas, tamales, and many other Mesoamerican foods. Traditional masa is made fresh; industrial masa often comes from dehydrated 'masa harina' (corn flour).
Example: Brands like Maseca sell masa harina in bags. Cooks mix it with water to make instant dough. Many traditional cooks say it does not match fresh masa.
Fausto Celorio Mendoza
A Mexican inventor (1909-1996) from Veracruz who patented the breakthrough automatic tortilla machine in 1947. His design pressed dough into rounds and carried them through gas ovens on a belt. His company sold tens of thousands of machines worldwide.
Example: Celorio sold his early machines quietly because he feared backlash from the women whose hand-made tortilla businesses he was replacing.
Tortillería
A small shop that sells fresh tortillas, made on site by a tortilla machine. Tortillerías are found in nearly every Mexican neighbourhood. Customers come with cloth bags to buy hot tortillas, often daily.
Example: A typical Mexican tortillería sells tortillas by weight, by the kilo. A worker weighs out a portion, wraps it in paper, and hands it over. The whole transaction takes 30 seconds.
Sazón
A Spanish word meaning roughly 'the seasoning that hands give to food'. Used in Mexican cooking to describe the personal touch that a cook brings to her cooking. Often used to argue why hand-made food tastes different from machine-made.
Example: Two grandmothers can make tortillas from the same masa and have them taste a little different. Mexicans call this each cook's 'sazón'. Machine tortillas are uniform; they lack this.
Use this in other subjects
  • History: Build a class timeline of the tortilla: nixtamalisation invented in Mesoamerica (~1500 BCE), maize spreads across the Americas (over thousands of years), Spanish arrival in Mexico (1519), tortillas continue as daily food, first tortilla machine patents (1859, 1904), Celorio's breakthrough machine (1947), tortillerías spread (1950s-80s), tortilla becomes second-best-selling US bread product (2000s). The story spans 3,500 years.
  • Science: Nixtamalisation is one of the most important food chemistry breakthroughs in human history. Soaking corn in alkaline water (calcium hydroxide solution) unlocks niacin (vitamin B3) and changes amino acid availability. Without it, a diet based on corn causes pellagra. Discuss how indigenous Mesoamericans worked this out by 1500 BCE without modern chemistry, and how the technique was only fully understood by scientists in the 20th century.
  • Citizenship: The tortilla machine changed Mexican women's lives by removing hours of daily unpaid labour. Discuss how technology can change the lives of one group while threatening the work of another. Other examples include sewing machines, washing machines, computers replacing typists, and now artificial intelligence.
  • Ethics: Hold a class discussion: 'When is industrial food better than hand-made food, and when is it worse?' Strong answers will see that 'better' depends on who you ask and what you are measuring. Cheap, fast, available food is a real good. So is the taste, variety, and tradition of hand-made food. Both are real. Both matter.
  • Geography: On a map, mark Mesoamerica (modern Mexico, Guatemala, Belize, Honduras, El Salvador, parts of Nicaragua and Costa Rica). Then mark the modern spread of the tortilla — across all of Mexico, into the United States (especially the Southwest), and increasingly to other countries. Discuss how a food can travel and how it changes as it travels.
  • Art: Each student designs a sign for an imagined neighbourhood tortillería. The sign should reflect what the shop sells (tortillas), the neighbourhood it serves, and one detail of Mexican culture they want to celebrate. Discuss: how do signs build community identity?
Common misconceptions
Wrong

The tortilla is just a Mexican food, not very old.

Right

The tortilla is one of the world's oldest staple foods, with a continuous history of at least 3,500 years in Mesoamerica. Nixtamalisation, the technique that makes it possible, was invented by 1500 BCE. The tortilla predates most of the world's other major bread traditions.

Why

'Just a Mexican food' misses how ancient and important this is. The tortilla is part of one of humanity's great food traditions.

Wrong

The tortilla machine was invented somewhere outside Mexico.

Right

All the major tortilla machines were invented in Mexico, by Mexican inventors. The breakthrough design was Fausto Celorio Mendoza's 1947 machine. Mexican companies still dominate the global tortilla machine industry.

Why

There is a habit of crediting industrial inventions to North America or Europe. The tortilla machine is a Mexican invention through and through.

Wrong

Nixtamalisation is a fancy modern process.

Right

Nixtamalisation was developed in Mesoamerica by about 1500 BCE — over 3,500 years ago. Indigenous Mesoamericans worked out the food chemistry without modern science. The technique is one of the world's great pre-modern food technologies.

Why

Calling it 'fancy modern' erases indigenous knowledge. The reverse is true: modern science finally caught up to what Mesoamericans had been doing for thousands of years.

Wrong

Industrial food is always worse than traditional food.

Right

Industrial food often has real benefits — it can be cheaper, faster, more available, and can free people from hours of unpaid labour. It can also lose flavour, variety, and tradition. The tortilla machine is a good example of both sides. Whether industrial food is 'better' depends on what you measure and who you ask.

Why

Romanticising hand labour can ignore the very real costs that fell on the women who did it. Dismissing tradition can ignore what gets lost. Both errors are common.

Teaching this with care

Treat the tortilla as a serious food with a long history, not a quaint Mexican curiosity. Use Spanish terms where appropriate — tortilla, tortilladora, tortillería, masa, comal, metate, sazón, nixtamal, nixtamalización. Pronounce 'tortilla' as roughly 'tor-TEE-yah' (the 'll' is a 'y' sound in Mexican Spanish); 'tortilladora' as 'tor-tee-yah-DOR-ah'; 'nixtamalisation' as 'nish-tah-mah-lee-SAY-shun'. Credit indigenous Mesoamerican invention clearly. Nixtamalisation is one of the great food technologies in human history, invented in Mesoamerica by 1500 BCE, long before modern chemistry could explain it. Do not let this credit be lost. The lesson involves women's labour. For 3,500 years, hand tortilla-making was almost entirely women's work, and it was hard. Do not romanticise the hand tradition without also being honest about the hours it took out of women's lives. Do not dismiss what was lost when machines replaced it. The Mexican women who lost their tortilla-selling work to the machines are real people who were really hurt. Hold both sides. Be careful with comparisons to other industrialised foods. Industrial bread, industrial milk, industrial meat — each has its own history. The tortilla story is specifically Mexican and should not be flattened into a generic story about 'industrialisation'. If you have Mexican or Mexican-American students, give them space to share their family's tortilla traditions if they want. Do not put them on the spot. Many will eat machine tortillas at home and have grandmothers who still make them by hand. Both are real. Avoid the lazy 'authentic Mexican' framing. There is no single authentic tortilla. Hand-made tortillas from Yucatan are different from hand-made tortillas from Oaxaca. Machine tortillas in Mexico City are different from machine tortillas in Los Angeles. All are part of the living tradition. Finally, end the lesson on the present. The tortilla is being made and remade every day by millions of people. The future is open.

Check what students have understood

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

  1. What is nixtamalisation, and why was it important?

    Nixtamalisation is the process of soaking and cooking corn in an alkaline solution (usually water with calcium hydroxide, called lime). It was invented in Mesoamerica by 1500 BCE. It softens the corn for grinding and unlocks niacin (vitamin B3), making corn-based diets nutritionally safe.
    Marking note: Award full marks for any answer that mentions both the process (soaking corn in alkaline water) and one of its benefits (easier grinding or nutritional unlocking).
  2. Who invented the modern automatic tortilla machine, and when?

    Fausto Celorio Mendoza, a Mexican inventor from Veracruz, patented the breakthrough automatic tortilla machine in 1947. His design pressed dough into rounds and cooked them on a moving belt through gas ovens.
    Marking note: Strong answers will name Celorio and the date 1947. Either alone earns most marks.
  3. What did the tortilla machine change for women in Mexico?

    For thousands of years, women in Mexican households had spent several hours every day making tortillas by hand. The machine freed many women from this work, but it also took away the livelihoods of women who made tortillas to sell.
    Marking note: Award full marks for any answer that recognises both sides — the freeing from labour and the loss of work.
  4. What is the difference between hand-made and machine-made tortillas?

    Hand-made tortillas are made by individual cooks using often traditional varieties of corn, and they vary in taste because of each cook's 'sazón'. Machine tortillas are uniform, fresh, cheap, and almost always made from industrial corn varieties. Most Mexicans today eat machine tortillas.
    Marking note: Strong answers will mention at least two of these differences. Either side of the comparison earns partial credit.
  5. How widespread is the tortilla today?

    More than 100,000 Celorio-brand tortilla machines are in use, plus many more from other Mexican companies and copies in other countries. The tortilla is now the second-best-selling packaged bread product in the United States, after sliced bread. Tortillas are also made in India, the Middle East, parts of Africa, and across Latin America.
    Marking note: Award full marks for any answer that recognises the global spread of the tortilla, with at least one specific detail.
Discuss together

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

  1. The tortilla machine freed Mexican women from hours of daily labour, but also took away the work of women who sold tortillas. Was the machine good or bad for women?

    Push students to see that 'good or bad' depends on which women. For the woman who spent 5 hours a day making tortillas for her family unpaid, the machine was a great gift. For the woman who made tortillas to sell as her main income, the machine was a disaster. Both women were Mexican. Both stories are real. Strong answers will recognise that technologies often help some people and hurt others, and that 'good or bad' is too simple. The deeper lesson is to ask, every time a new technology arrives, 'good or bad for whom?' This is one of the most important questions a citizen can ask about any new technology, including the ones arriving today.
  2. Is there something important that is lost when food stops being made by hand?

    This is a real ongoing debate. Some students will say yes — the daily ritual, the taste differences, the variety of traditional varieties, the personal touch ('sazón'), the cultural memory. Others will say no — food is food, and the time saved is more valuable than the loss. Both arguments are real. Strong answers will see that something is lost and something is gained, and that what matters most depends on what people value. The Mexican tortilla story is one of many examples. Bread in Europe used to be hand-made; now it is mostly factory-made. Most students' grandparents had different food than their grandchildren do. End by asking: in your own family, what food did your grandparents make that you do not?
  3. If a new machine could replace something that you do today, would you want it to?

    This is a creative, personal question that connects the tortilla story to students' own lives. Some will say yes (replace the boring tasks). Some will say no (some tasks are pleasurable, or proud, or part of who they are). Strong answers will see that the answer depends on the specific task. Many Mexican women in the 1950s and 1960s chose to use machines because the work was a burden. Others kept making tortillas by hand because it was part of their identity. End by saying that this is the same choice every generation has to make about every new technology. The choices students make about today's new machines — including artificial intelligence — will be similar to the choices Mexican women made about the tortilla machine.
Teaching sequence
  1. THE HOOK (5 min)
    Without saying anything about the lesson, ask: 'How long do you think people have been eating tortillas?' Take guesses. Then say: 'About 3,500 years. The tortilla is older than the Roman Empire. Older than Buddhism. Older than most things we think of as old. But the machine that makes most of them today is only 80 years old. We are going to find out about both.'
  2. INTRODUCE THE OBJECT (10 min)
    Describe the tortilla machine: a device that automatically presses, cuts, and bakes corn tortillas. Invented by Fausto Celorio Mendoza in Mexico in 1947. Used in more than 100,000 shops today. Pause and ask: 'What does it mean when a 3,500-year-old food gets a machine?' Listen to answers. They will lead into the questions of change, loss, and gain.
  3. THE ANCIENT FOOD (15 min)
    On the board, write the word 'nixtamalisation'. Tell the students this is one of the most important food technologies in human history. Invented in Mesoamerica by 1500 BCE. Soaks corn in alkaline water (lime). Unlocks vitamin B3 (niacin) that the body cannot otherwise get from corn. Without it, a corn-based diet causes a disease called pellagra. Indigenous Mesoamericans worked this out 3,500 years ago without modern chemistry. Discuss: this is the kind of indigenous knowledge that is often forgotten.
  4. WHO LOSES, WHO WINS (10 min)
    On the board, write two columns: 'Who won when the machine arrived' and 'Who lost'. Help the class fill them in. Winners: women freed from unpaid family labour, customers who got cheap tortillas, Mexico's urban economy. Losers: women who sold tortillas for income, traditional corn varieties, the daily household ritual, the variety of regional styles. Discuss: most technologies have winners and losers. Industries that help some hurt others.
  5. CLOSING (5 min)
    Ask: 'Is there a machine like this in your life now — one that has changed something old and important?' Take a few honest answers (washing machines, dishwashers, microwave ovens, mobile phones, search engines). End by saying: 'Every generation faces this question. The Mexican women who decided to start buying machine tortillas in the 1950s were facing the same kind of choice you are facing about new machines today. The tortilla machine teaches us to ask, every time: what is gained? What is lost? Who decides?'
Classroom materials
The Daily Tortilla
Instructions: Ask each student to find out, before the next class, how their family gets their daily bread or staple food. Do they make it? Buy it? From where? How long does it take? In the next class, share answers. Most students will discover their families buy almost everything. Discuss: this is the same kind of shift that Mexican families made with tortillas in the 1950s and 1960s.
Example: In Mr Lopez's class, students reported on bread, rice, naan, injera, and matzah. Almost all came from shops or factories. The teacher said: 'Your grandparents almost certainly made or grew much of what they ate. Your parents probably did some. You do almost none. The tortilla machine is one chapter of this huge shift. Most foods in your lives have gone through similar changes.'
The Ancient Chemistry
Instructions: Explain nixtamalisation simply. Corn has hard outer hulls. Soaking corn in water with calcium hydroxide (lime) softens the hulls. It also chemically changes the corn to release niacin, vitamin B3, which the body needs. Without this, people who eat mostly corn get a serious disease called pellagra. Ancient Mesoamericans worked all of this out by 1500 BCE. The lesson is that 'science' is older and more global than most schoolbooks say.
Example: In Mrs Garcia's class, students were shocked to learn that the chemistry of nixtamalisation was not understood by Western science until the 1900s — more than 3,000 years after Mesoamericans were already using it. The teacher said: 'This is a clear case where indigenous knowledge ran ahead of formal science. There are many other such cases. Plant medicine. Navigation. Agriculture. Indigenous peoples around the world knew things long before our textbooks credit. The tortilla is one example.'
Win and Lose
Instructions: In small groups, students pick one technology that has appeared in their lifetime — smartphones, online video, ride-sharing apps, generative AI, anything they choose. They list two columns: 'who won' and 'who lost'. Each group shares their answer. Discuss: the tortilla machine story is one example of a pattern that keeps happening.
Example: In Mr Rivera's class, students discussed ride-sharing apps. Winners: customers (cheaper, easier rides), drivers who chose the work. Losers: taxi drivers whose licenses became worthless, public transport in some cities. The teacher said: 'You have just done what the Mexican families had to do in 1950. Every technology has winners and losers. Knowing how to ask the question is the first step in thinking like a citizen.'
Where to go next
  • Try a lesson on the onggi for another traditional food technology with deep cultural roots.
  • Try a lesson on the injera platter for another staple flatbread from another continent.
  • Try a lesson on the obsidian blade for another deep technology from the Americas.
  • Connect this lesson to history class with a longer project on the industrialisation of food in different regions of the world.
  • Connect this lesson to science class with a longer project on food chemistry and nutrition, including pellagra and the discovery of vitamins.
  • Connect this lesson to citizenship class with a longer discussion of how to think about new technologies as they arrive — including artificial intelligence, automation, and other changes happening today.
Key takeaways
  • The tortilla is one of the world's oldest staple foods, with a continuous history of at least 3,500 years in Mesoamerica. Nixtamalisation, the technique that makes it possible, was invented by 1500 BCE.
  • For thousands of years, all tortillas were made by hand, almost entirely by women, in a process that took several hours every day.
  • The modern automatic tortilla machine was invented by Fausto Celorio Mendoza in Mexico in 1947. His design pressed dough into rounds and cooked them on belts through gas ovens.
  • By the 1980s, most urban Mexicans bought their tortillas from neighbourhood shops with machines, rather than making them at home. The machine had transformed daily Mexican life.
  • The machine had winners (women freed from labour, customers with cheap tortillas) and losers (women who sold tortillas for income, traditional corn varieties, the household ritual). Most technologies have similar patterns.
  • Today the tortilla is the second-best-selling packaged bread product in the United States. A small movement for hand-made tortillas continues. The future of the tortilla is being decided every day by the people who eat them.
Sources
  • Tortilla machine — Wikipedia (2026) [encyclopedia]
  • Nixtamalization — Wikipedia (2026) [encyclopedia]
  • Cuándo, cómo y quién inventó la máquina para hacer tortillas — MXC (2020) [news]
  • What Is Nixtamalization? The History Behind the Traditional Technique — The Kitchn (2023) [news]
  • Tortilla: A Cultural History — Paula Marcoux (2020) [academic]