This Fluency Activity is a part of the Lesson 14, Unit 1, Grade 1. This activity supports the connection of counting on by 2 and adding 2 with counting back by 2 and subtracting 2. The teacher says a number aloud. Students repeat the number, touching their heads and counting on as they put their fists in the air, one at a time. Alternately, students can count on with boxing punches. Extend the game by counting back 2.