Trade in your used games, curriculum, manipulatives, books for new ones. Below are the items you can trade for. Rules For Trade In.... 1. Must be in good condition. 2. No missing pieces, pages or torn materials etc.... 3. You can trade in twice a year. 4. New items will be shipped, after trade in has been inspected and approved. 5. If trade in is not approved, your items will be shipped back to you and no trade will occur.