This Track addresses the learning gap of my third grade students struggling with addition and subtraction with regrouping. This learning gap is addressed through the TN Curriculum Framework Content Standards for Math 3-5: Number Sense and Number Theory; Estimation, Measurement and Computation. Expectation for these standards state:Relate the use of number in the learners' environment to the study of number; represent whole numbers concretely, pictorially, and symbolically; demonstrate a sense of reasonableness of results involving number and measurement; apply understanding of relationships between operations; demonstrate understanding of whole numbers by relating counting, grouping and place value concepts; use physical numbers to demonstrate the relationships among numbers and operations including fractions and decimals; and estimate, calculate, and evaluate solutions and communicate supporting statements. This unit provides various activities that encourage the mastery of addition and subtraction with regrouping. This unit also addresses several of the Student Survey questions from the Profiler Survey including: I learn something as completely as I can; I try tasks even if they are difficult; and I connect things I learn in school to things outside of school. Students will be actively involved in many activities to promote learning.