The Government of Alberta Agriculture and Rural Development Office has developed a wonderful guide packed full of great tips for Earthbox use, as well as lesson plans to help you from seed to salad, or salsa, or soup! A Guide to Growing School Gardens in Alberta
BC Agriculture in the Classroom has an amazing program for students called Spuds in Tubs. Check it out!
The Agricultural Education office of the Nova Scotia Department of Agriculture has created a School Garden Guide (in PDF) that as great information in it as well!