This video is part of the Learn and Grow with WHRO TV series. Watch Shantel Davis teach about ten more and ten less.

This is a remix of Which number is greater?  Which number is less?  How do you know? from Illustrative Mathematics,  https://tasks.illustrativemathematics.org/content-standards/tasks/1210.The lesson supports sol K.2a.  The purpose of this activity is for students to explain how they know one quantity is greater or less than another quantity.  The teacher demonstrates whole group before students play with partners and encourages student talk.