This Pre-test, Post-test, and *Modified* Post-test, and an Enrichment Challenge were created for my 3rd Graders to assess their prior knowledge of adding and subtracting multi-digit numbers and their knowledge after teaching the lessons as well as after reviewing more when they did not show mastery on the first post-test, yet this could be used for students Grades 2-4. These can be assigned to students using Google Classroom or sharing the form links to be completed. Each form requires all