This 11-Day 3rd Grade Math Unit covers Numeration-Place Value and is aligned with the Common Core Standards. This unit was developed to meet standards 3.NBT.A.1 and 3.NBT.A.2: Use place value understanding to round whole numbers to the nearest 10 or 100; and Fluently add and subtract within 1,000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.This unit will review 2nd grade math standards and assist student