 A center is a place in the classroom that has an academic focus. I have centers in my classroom that are based on math, reading, writing, STEM, which STEM stands for science, technology, engineering and math, as well as fun centers like a block center or a home living center, a library center. There are centers in my room that are locations, so I specifically set them up so that the kids can go to that center, grab a basket, grab an activity and do the skills necessary at that center. I also have mobile centers and that would be something that is put into a basket or a bin and the kids can move those centers around the classroom. Every once in a while I'll take centers and put them on a tray, move them to my seating area and have the kids focus on doing the centers as a whole group. Other times during the day, like stop the world, I have my students pick a center and they focus on the center just for themselves.