This Fluency Activity is a part of the Lesson 13, Unit 4, Grade 1. This fluency activity assesses students' progress toward mastery of the required addition fluency for first graders. Differentiated Practice Sets can be found in Lesson 23, which may be helpful in supporting students toward these goals. Students complete as many problems as they can in three minutes. Choose a counting sequence for early finishers to practice on the back of their papers. When time runs out, read the answers aloud so students can correct their work and celebrate improvement.