Free study site for Grades 7–9 · plus a hand-drawn card game

Math, taught by hand. A study site — and a card game.

MathKong is two small things, kept on purpose separate. A free study site for Grades 7, 8 and 9 with handwritten booklets and quick practice quizzes — and a hand-drawn card game kids can play at the kitchen table or in math club.

How it works

3 grades, 34 topics

Quizzes & mistake review

Free · no sign-in

~ how it works ~

Four steps. One topic at a time.

Every grade is broken into about a dozen topics. For each one you read the lesson, try a few questions, then come back the next day. That's the whole loop — no streaks to chase, no leaderboards to lose to.

Pick your grade

Grade 7, 8, or 9. Each one has its own booklet of topics, written in friendly english.

Read the lesson

Open the handwritten booklet to the topic you're stuck on. Examples, "friend notes," and "watch out!" warnings.

Practice the topic

Quick-check quizzes and test-style questions. Get one wrong? A link sends you back to the right page in the booklet.

Play a quick game

Two arcade games (Tetris & Race) drop grade-level math between rounds, so practice feels like recess.

~ also: a real card game ~

There's a card game, too.

Alongside the website, MathKong is a small deck of hand-drawn number & operator cards. Kids shuffle, deal, and invent the rules — perfect for math clubs, classrooms and bored Sunday afternoons.

It's a separate thing from the study site you're on right now. The cards live on their own page so the two don't get mixed up.

See the card game → Or back to the booklets

~ a note from the desk ~

Handwritten on purpose.

Every lesson on this site was written by hand in a notebook first. The scans you see aren't decoration — they're the source. Cleaned up, yes. Rewritten in a computer font? Never.

Handwritten math reads slower. That's the point. It gives kids a moment to catch up, to notice where the pencil stopped to think, to feel like someone is actually talking to them — not at them.

The whole site is free, has no sign-in, and isn't trying to sell you a streak. Just a small kid with a notebook, trying to make math feel a little less scary for the kid next to him.

Topic 07 · Vectors

A vector has both magnitude & direction.

a = (3, 4)

|a| = √(3² + 4²) = 5

Add them by stacking components:

(2,1) + (3,−4) = (5, −3)

✎ check: does the answer feel right?