Are you looking for fun and engaging 1st grade guided math lessons? Use these number sense activities to help your students develop number sense! These number sense centers introduce and review subitizing, ten frames, twenty frames, counting forwards and backward, and skip counting. This comprehensive 1st grade guided math unit contains 15 days worth of highly engaging lesson plans, activities, games, posters and centers! Use these number sense activities all year long. Included with these 1st