Teach Children Math

A free, open-source math program built on proven Direct Instruction methodology. No accounts, no tracking, no cost.

How It Works

Each lesson tells you exactly what to say and do. No teaching experience needed.

Numbers, dots, and number lines guide the learner through each concept step by step.

Short daily sessions build math skills through structured repetition and immediate feedback.

150 structured lessons across 7 phases, from counting to two-digit arithmetic.

Lessons 1–20. Numbers 0–10, counting, one-to-one correspondence, and comparing.

Lessons 21–40. Numbers to 20, number patterns, and introduction to the plus symbol.

Lessons 41–65. All addition facts to 10, doubles, number bonds, and the commutative property.

Lessons 66–85. Subtraction facts to 10, fact families, and the relationship to addition.

Lessons 86–105. Tens and ones, counting to 100, and addition/subtraction within 20.

Lessons 106–125. Mental math strategies, make-10, and two-digit plus one-digit.

Lessons 126–150. Two-digit addition and subtraction with regrouping, and word problems.

Once the learner has completed a few lessons, they can practice on their own with our collection of problem sets.