This is an organization time-saver I use in my classroom to help students know if they have a full set of pattern blocks. We begin the year by checking our bags using the full page chart, which I also store with my extra pieces. It's a helpful transition lesson to review counting concepts and discuss caring for and using math tools. Throughout the year, they keep the small chart in their own math toolbox bags so they can check to see if they have the right number of pieces.
This is also helpful if you keep pattern block sets with a math center, to help the students clean up after the math center and make sure all the pieces are where they need to be. If laminated, the students can mark each piece with a dry-erase marker.
I've included a version with and without the tan rhombuses, since we don't use those pieces much in first grade, and may opt to leave them out of the manipulative sets at times. If you use a different mix of materials and would like a custom checklist, let me know! This can be used with foam pattern blocks, paper cutout pattern blocks, wooden pattern blocks, or plastic pattern blocks. Enjoy!!