Also, as for organization of my materials... For the most part I keep all my file folders in one crate. In those file folders I have my topics labeled (stars, baby animals, our country, plants, spiders to name a few). That way if I know I'm going to cover a topic I can go straight to that file and have ready made ideas! Plus, the more I do this, the more I can just add straight to that file for the next kid that I do preschool with. :)