Over the summer, during a class, I learned about the CK-12 foundation. This is a great website filled with a variety of resources for both teachers and students.
You also have the choice of adding it to a library, sharing things, download (in PDF, mobi, or epub formats) or customization. It is free to join and I plan to use this website for a class I have to teach. Due to the way the schedule ended up, I have to combine two classes and I can use this website to prepare materials for the older students so they can be more independent learners so I can work with the younger students.
I see so many ways I can use the materials in all my classes. Yeah!