How I set it up to REUSE all the materials with each kid…I pre-assemble the activities in a large 3-ring binder before we ever start the next level - The student book that comes with each level has lots of hands-on manipulative games to reinforce the concepts being taught throughout the book. I hate collecting and assembling lesson pieces on a daily (or even weekly) basis. I would much rather have a huge “project” where I gather everything for the whole year at once, spend several hours, and get it all done. Then when we are in the middle of a busy homeschool day, I can just grab it and start teaching.