It isn't a new, or an original idea to use lids as manipulatives in the classroom. I read about collecting household items to use in math instruction in Math Their Way, first published in 1976. There are a lot of innovative ways to use these free materials to teach mathematics, as well as art and environmental awareness. Today I'd like to share some of them with you. Sorting... we sorted by color here... ... and by size and shape here. It's fun to make concentric circles, which also happens…
