Help your 3rd grade students confidently add within 1,000 using regrouping and place value understanding with this comprehensive math lesson plan resource. This addition with regrouping lesson helps students learn when and why they need to make a new ten or a new hundred while adding. Using place value models and vertical addition, students explore how groups of 10 ones become 1 ten and how 10 tens become 1 hundred, building a strong conceptual foundation for addition with regrouping. Designed f