This Fluency Activity is a part of the Lesson 17, Unit 4, Grade 1. This review sheet contains the majority of addition facts with sums of 5-10, which is part of the required core fluency for Grade 1. The focus on missing addends strengthens students' ability to count on, a Level 2 strategy that first graders should master. Keep this activity out so students can use it in the next fluency activity. Encourage students to set goals for improvement on Sprints and fluency reviews. Provide scaffolds, strategies, and opportunities for practice to help them reach their personal goals.