I am a little sick right now. I have just learned that I have been overpaying for everything I purchased for homeschooling. Ugh. Anyway join the Homeschool Buyers CO-OP. There is power in buying in a group. If you purchase through the group the cost is less, buying in bulk is cheaper. Considering I am trying all kinds of newer online options I know this will save me a fortune. I am just sorry I didn't know about this sooner and that I didn't come up with the idea. (Things have changed so much from when I first started this stuff 19 years ago.) Click here to visit and join the Homeschool Buyers CO-OP, don't worry it is free.