Unit 3 builds strong early number sense through systematic, engaging instruction. Students move from comparing numbers within 5 into addition and subtraction within 5, with each week intentionally building on the last. Lessons follow the FLAME routine, including subitizing, visual and auditory drills, number talks, counting practice, and a focused new concept or review. This unit includes 1,003 slides of structured, developmentally appropriate instruction. This unit also includes the full teach