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?
If the workbook is well loved and pretty much all pages are written in then I toss it after the school year is complete.
If it's for one of my three older children then I will most likely copy the pages from it so that I can use it on the next kid when they hit that grade.
If it's only partly worked in and I don't plan to ever use it again then I will often tear out the pages my children have worked on and give the unused part of the workbook to a friend of mines children who are younger than mine and like them for practice.
I also have a few unwritten in, but used workbooks that I plan to sell on Amazon sometime. Needless to say, I don't keep things I don't plan to make use of.
I've saved mine for now. I figure if I need proof for any reason, I'll at least have that in case other paperwork and portfolios are lost.... (I hope they never are but I'd rather play it safe than sorry with how much we move)