This Fluency Activity is a part of the Lesson 1, Unit 2, Grade 1. This activity builds fluency with partners to ten and promotes an understanding of equality. Assign students partners of equal ability. Students arrange 5-group cards from 0 to 10, including the extra 5, and place the "=" card between them. Write 4 numbers on the board (e.g., 5, 9, 1, and 5). Partners take the 5-group cards that match the numbers written to make two equivalent expressions (e.g., 9 + 1 = 5 + 5).