Ideas for DIY color/shape sorting using egg cartons and pattern cards. Perfect for pre-k students, or any student needing help with patterns/one-to-one correspondence! Also good for older kids to "plan out math" for their younger siblings.
Black cardboard cut out frames with some coloured cellophane = fun colour window shapes. I initially made them for Otis but Caspar liked them just as much. I was inspired by Kate's post on window blocks.