I learned recently about a fascinating twist on school gardening available through the International Space Station. You can request tomato seeds that have spent time on the ISS. Then your students grow them in your school garden and compare them to Earth-bound controls. They even get access to the data from all other participating schools.
It’s a great way to connect your school garden to your space curriculum, teach about controlled experiments at the same time, and generate data for making claims! Tomatosphere is a partnership between First the Seed Foundation and NASA. You have to get them planted this spring, and there is an application, so if you are interested, I would check it out sooner rather than later.