Hello all, I am starting out the school year on the 28th for a preschool class of 3 and 4 yr old students. I need help developing centers. I want to have some mandatory (a math, language arts, writing activity) and some optional centers each day. I think that some of my centers will include math, writing, dramatic play, art, science/sensory, library, blocks, trucks, etc. I would like to know how you keep track of which students have visited each center. I am also welcome to any suggestions regarding centers in general.