Addition & Subtraction Math Fact Fluency Intervention Evidence-Based | MTSS & Special Education Aligned | Grades K–3Are your students struggling with addition and subtraction fact fluency—even after repeated practice or drills? This 6–8 week, research-based intervention is designed to build true fluency through strategy instruction, accuracy, and reasoning—not memorization alone. This resource provides everything you need to implement a data-driven, defensible math fact fluency intervention