Take a sandwich and explore the commodity chain. Who prepared it? Where? How much were they paid? Where did the ingredients come from? How were they assembled? Questions like these could be investigated from KS1 onwards.
Link this chain to the environment. What conditions does wheat grow best in? How do farming practices affect the environment? What impact could genetically modified wheat have on an ecosystem? These questions are particularly relevant to KS3 5b, 6e, 6h, 6j and 6k, but would be good stimulus work for a range of issues at GCSE and A-level.
Try a new approach to teaching settlement. Explore the relationship between the origins of the first villages and the growing of wheat. Map the spread of farming and settlement from the Middle East to the shores of northern Europe. Investigate the impact of snack bars on the High Street and food packaging on the environment. These activities could be introduced at KS2, for example 5a, 6d, but used across KS3 and GCSE.
Buy breads from different parts of the world. Map them. And then eat them - all ages!