Hi there, I'm a first year teacher, and I recently started up math workshop/centers in my class. Before the year started, I collected a hodge podge of manipulatives that other teachers had extras of, but I still feel that it's a little incomplete. Could anyone give me a list of what they have (or what they consider to be "essential" manipulatives). I don't know that I'll be able to get them all, but at least I have an idea of what to look/ask for! Thanks!