Calendar: Great classroom organization tip! Put calendar numbers or words on large rings--everything flips. No more boxes/files to store extra numbers or words. Make a few blank cards on the rings too, so you can change things up when necessary.
Had when i worked in a preschool and kids love them! I would use colored sand instead of white salt. DIY salt tray with alphabet cards. Easy to make and kids have fun smoothing out the salt after correctly making the letter