I have bought 300+ AR books for my classroom library and I need help organizing them. Do you organize by genre, level, or author? I would like to organize by genre if possible. I just need ideas where to start. I feel dumb because some books I'm not sure what genre they fit in. I just bought 17 small tubs (every one they had) from Dollar Tree in three different colors to help sort them. I would have bought a color for each genre, but they only had three colors. Any suggestions would be very appreciated.