ADHD-Friendly Double Digit Addition & Subtraction | Smash & Build Method | Grades 1-3 Part 2Give your students or child the calm, step-by-step double-digit math practice they actually need! This is Part 2 of the proven Smash & Build method — perfect for ADHD, math-anxious, or overwhelmed learners in 1st, 2nd, and 3rd grade. Students now practice with regrouping (carrying) and borrowing using the same gentle “Smash & Build” strategy they learned in Part 1. These low-stimulation double digit ad