This Fluency Activity is a part of the Lesson 6, Unit 2, Grade 2. Students fluently count by tens crossing the hundred and relate it to metric units. Let's do some Happy Counting in centimeters. Watch me as I pinch the meter stick where the centimeters are while we count. When I get to 100 centimeters (1 meter), I will call a volunteer to hold another meter stick. Let's count by tens, starting at 70 centimeters.