I recommend purchasing the bundle instead of individual sets if you wish to differentiate in your classroom.
This bundle includes worksheets at 3 different levels. Each worksheet is completely unique among grade levels, so Level A, B, and C for the same lesson will have completely new content on each.
Purchase today and download Level A Grades 4-5 now. The remaining sets will be be available in December - see dates listed above. You'll simply return to your My Purchases page and download the product again after those dates to get the other packs in this bundle.
I'm making this available now for those who want to get the discount for purchasing all 3 but want the first set now.