Grouping through friendly numbers builds greater mental number sense. These 50 page digital slides will project colored shapes, that students will mentally calculate, then calling out the number that they see. Students will learn to group by twos, threes, fours when possible and the friendly fives and tens as they can. Subitizing patterns in life opens the world to mathematical number sense strength. Seeing arrays, patterns, ad grouping colors will challenge speeds to increase through this