We all know how to add but do we really understand what is happening?
Addition is an important skill for elementary. Students need to understand place value as they combine numbers and items. Addition starts simple with ten frames and move to number bonds. Students then move to use open number lines and regrouping.
The links below will give you a better understanding of the mathematics behind the process.
Add and subtract within 20 — A video from Engage NY showing common core methods for addition for 2nd grade.
Addition and Subtraction for grade 1 — engage NY studio talk 1.OA
Using Place Value for Addition and Subtraction — Engage NY video for grade 2