I am currently homeschooling my two boys without a set curriculum (big mistake! But that's another story) I thought it would save money by just buying workbooks such as the spectrum workbooks, the worldy wise books and also school zone. When I'm finished with a workbook, I want to throw it away. But, I'm not sure if I should do that. I don't know why I hang on to them, come to think of it. Do you give them to others to white out the answers or just chuck them? What do you do with your used workbooks?