A class of seven-year-olds are making maps to show where their food comes from. Choosing suitable symbols, they mark their homes, the school dining room, the local cafes, chip shops and the supermarkets where their parents shop. The weave of their daily lives is revealed: the Saturday shop at Tesco followed by football practice, Sunday lunch at the pub, the family meal in the evening or maybe chips on the way home from school. Then they go a bit further up the food chain: where do these shops and cafes get their food from? It’s time for a discussion about farms and whether you can grow oranges in the UK.

The children soon realize how much they don’t know. They plan an enquiry into the matter, using the internet and interviews. A farmer comes in to answer their questions, and it’s then that the magic happens. Children are enthralled to find out that it might actually be someone’s job to grow potatoes, milk cows and drive tractors. They lap up not just the fascinating details – like the existence of machines for scratching the backs of cows and how the potato farmer buys his potatoes back from the supermarket in the spring because he doesn’t have cold storage on the farm and his own potatoes have started to sprout by the end of the winter – but also the generalities of what it feels like on the inside of farming. “What’s good about being a farmer?” “If you hadn’t decided to be a farmer, what job would you have chosen?” they ask more than once. He talks about being in the fresh air, caring for animals, sharpening his skills and deriving satisfaction from producing food that people need.

Without thinking about it, he is giving the children a lesson in values. This matters, because children are growing up in a world that endlessly gives them the message that happiness comes from earning lots of money, having the latest gadgets and wearing the right brands of clothes. The education system, meanwhile, is increasingly based on the notion that academic achievement is all that really matters, leading to an emphasis on the things that can be measured – numeracy rather than creativity, literacy rather than self-expression. Qualities like kindness and courage, literally, don’t count. This can create a dichotomy between success, status, money and security on the one hand, and generosity, community and connection with nature on the other, and it is worth a closer look at what is going on.

Research from social psychology collated by the Common Cause project, which aims to make compassionate values central to public life, reveals a complex picture. It shows that we all hold a broad range of values, many of them apparently contradictory, but all corresponding to a genuine need. Thus, success is an important value (if you doubt that, consider failure), but so is humility, in the sense of appreciating our dependence on others. Our brains however find it hard to hold both these values at once, and so we seesaw between them, depending on where we are and what we are doing. In the garden, cutting lettuce for dinner, it is easy to feel close to nature, but in the bright lights of the supermarket we easily forget that and look for a tasty bargain. Similarly, talking about money makes us selfish, while the story of a refugee child drowning can inspire an upsurge of generosity.

What does this mean for education? A fascinating experiment carried out at Cardiff University shows how excessive enthusiasm for academic success might have unintended consequences. The experimenters asked one group of people to sort through cards bearing words like ‘capable’ and ‘successful’, so that they were tuned into their desire for achievement, while another group sorted words associated with altruism, like ‘forgiveness’ and ‘helpful’. They were then given a puzzle to solve, and asked to help the experimenter with a task. The result was that the group that had been primed for achievement did better at solving the puzzle than the other group, but they also turned out to be less likely to help the experimenter. Could it be that pushing young people to pass exams will make them selfish?

Fortunately, good teachers – left to themselves – know how to guide children towards a more rounded view of life, helping them to widen their circle of concern from themselves and their friends to humanity in general and to nature and the planet. They see how the security of belonging to a family or nation can nurture their curiosity and give them the confidence to explore new worlds, coming up with fresh solutions to the challenges that humanity faces. They know that success is a wonderful thing, but it needs to be contextualised. Achievement should help children to develop self-respect and confidence, and to share their gifts with others; it should not be about becoming ever richer and more powerful at the expense of the planet. And that is where food education comes in – as an antidote to consumerism, targets and competition.

There is something inherently democratic about food. We are all equal in our need for it. Sitting around the table for a meal reminds us that we all deserve to eat, and that we have an obligation to ensure that others can too. Studying the food chain cuts through the notion that we are self-made individuals, and reminds us of our interdependence. Not only do we rely on a vast worldwide network of farmers, growers, supermarket shelf-stackers, cooks, bakers, abattoirs, vets, food scientists and lorry drivers to feed us three times a day, but we are all ultimately dependent on healthy soils, rainfall, sunshine, bees, worms and the rest of the biosphere to keep us alive. We cannot separate ourselves from this.

On a farm visit, children encounter the natural world, appreciating the compromise between human needs, animal welfare and wildlife. When they make the connection between farm animals and the food chain, or see the uncultivated margin around a cereal field where wildflowers and insects flourish, or learn how drought and flooding can destroy crops, they see the tough decisions that need to be made if we are to feed ourselves. Back in school, following crops such as broad beans and potatoes from seed to plate, they gain skills and confidence as they learn to partner with the rhythms of the seasons. The enthusiasm and earnestness with which some children will plant, weed and dig in the school garden suggests they are gaining something more necessary to them than exam results. Maybe it is because they sense their need for a deeper connection with nature, which according to the RSPB report Every Child in Nature is an important support for health, well-being and personal and social skills.

The school curriculum is notorious for its pendulum swings, from a prescriptive top-down approach to local autonomy, from narrow academic goals to a child-centred focus. Schools may yet be freed from the assumption that they exist to produce a skilled workforce that attracts inward investment, and instead be encouraged to embrace a wider more holistic vision of the education they provide. In Wales, a new curriculum arriving from 2018 balances academic achievement with ethical citizenship, creative expression and confidence, and offers hope of a fresh start in our schools. Until that time, food education should be embraced not just because of the contribution it can make to attainment but also for its moral basis. It’s time to give children a proper grounding in the interdependence of humans and nature, starting with the meals they eat three times a day.