This download includes a lesson plan aligned with Common Core Standard 1.NBT.1. It introduces students to using a number grid with the numbers 0-50. There is a whole-group lesson plan and a game included for students to play with a partner to practice using their number grids. A 0-50 number grid is included with return sweeps highlighted the same color to assist students. There is also an independent practice page included for students to show what they learned. It can be used to assess whether or not students understand how to use their grid. If students are familiar with using number grids, it could be used as a center. It would complement first grade, Everyday Math, Unit 2. Thanks for looking!