......I must have 2 lessons plans prepared each class. One for good weather and one for bad. Here are an example of things I did in bad weather. I introduced vermaculture during the winter months. The kids love the worms. So we composted all winter in our worm hut. We learned about the soils web of life. I invented games assigning each one a character to become in that web. Example one was organic composting material while others were bacteria, mold, fungus, mold mite, earthworm ect. They each held a piece of yarn of the corresponding food providing character. forming the web of life as they all stood in their inter connecting positions. If their food source died they then had to fall dead too. This really helped the kids understand how the food web worked.........
This is why I see the garden as part of a larger curriculum of, I guess you could call it "life skills" and knowledge - including soil and water science, ecology, botany, biology, growing, harvesting, preparing, preserving, and serving. History of all these aspects could be included as well - "heritage skills" etc.