I like things that are easy to grow, cost a lot in the shops and taste better than you ones you buy. Strawberries tick every box. Plus each plant makes 4-5 new plants every year so you can give them away to children and parents.
This was just the perfect pea pod we picked today at Armitage. Peas are a lovely thing to grow in schools, easy and reliable and virtually all children will eat them. Mange tout are also easy to do and you can get all kinds of interesting varieties, we've got some purple podded peas on the go at Armitage. At the end of the growing year let a few pods stay on the plant to dry out and you've got next year's seeds plus a real life illustration of the plant life cycle.