This Fluency Activity is a part of the Lesson 2, Unit 3, Grade 1. In the first two modules, students practiced counting by ones, tens, twos, and fives, both the regular way and the Say Ten way. Reviewing these counting patterns within 40 prepares students for Module 4 while strengthening their understanding of place value and their ability to add and subtract. Choose a counting pattern and range based on the class's skill level. If students are proficient up to 40, start at 40, and quickly go up to 80. If they are proficient between 40 and 80, Happy Count between 80 and 120.