This product breaks down the CCSS 3.NBT.A.1 to make it easier to understand what is required of the students so you know how to best teach them the standard fully!This document includes the standard, item specifications, test-response items, achievement level descriptors, what the students have to know and do, the progression of the standard, essential question, and learning goals.Check out my TPT shop for the worksheets that align to this unpacking of 3.NBT.A.1!