📹 WATCH: Amare, a first grader, demonstrates the typical entry strategy at this level in skip-counting by tens and counting on the ones. The teacher prompts him to check on his understanding of the hierarchical and inclusive structure of the number system. Find more than 50 classroom videos just like this one in our newest publication, Math Trajectories for Young Learners. This book gives PreK–2 teachers a clear roadmap for identifying where each child is in their math journey and selecting the