OT Classroom

Place Value Support Charts for Addition & Subtraction (HTO and ThHTO)These Hundreds–Tens–Ones (HTO) and Thousands–Hundreds–Tens–Ones (ThHTO) charts were created to support students who understand math concepts but struggle with organization, alignment, and place value errors. These charts are especially helpful for learners who can’t draw neatly, lose track of columns, or make simple counting and regrouping mistakes that don’t reflect their true math ability. Instead of drawing base-ten block