This is our Math Center. We have so many math manipulatives that I am running out of room for them. The manipulatives in the bins in the shelf holes are available to the kids at all times. Those in the plastic containers on top came with our Investigations program. They are duplicates of the ones in the bottom bins so I keep them in the original containers so they are organized for math lessons. I use the small bins next to them to put them on tables for the students.