Crossword puzzle
Add your words and clues, and the crossword grid builds as you type. Play it online, share it or print it.
You bring Words + clues 3 min
Theme · Math puzzles
Math puzzle makers: arithmetic practice that does not look like a worksheet.
Generated sums at the level you choose, sudokus in 5 sizes, and the card and sentence generators with numbers in them. Difficulty is a setting; the puzzles are made for you.
7
generators in this theme
4
operators — add, subtract, multiply, divide
5
sudoku sizes, from 2×2 to 4×4
Arithmetic sums · live preview
Pick the level, the operators and the steps per sum; the questions are generated, not typed. Feedback per sum is a switch.
Start from what you already have
— pick the input, we shortlist the generators.The math generators
Every generator here works from content you already haveMatching game
Create an online matching game: cards of text, image or audio that players drag into place beside their match — or join with a line.
You bring Cards to match 3 min
Memory
Create a memory game online: classic pairs to flip and match, made from any mix of text, image and audio cards.
You bring Pairs to flip 3 min
Arithmetic sums
Write a secret message and every letter gets an arithmetic sum. Players solve the sums to reveal it: math facts practice with a sentence as the reward.
You bring A sentence 2 min
Fill in the gap
Type your sentences, click the words that become gaps, and the exercise is done.
You bring Sentences 3 min
Sudoku
Pick a size and a difficulty and a sudoku with one solution is generated for you. Play it online, share it or print it.
You bring Nothing 10 sec
Times tables
An online multiplication game for the times tables 1 to 12: correct answers colour in a hidden picture, and any fact a child misses comes back until it sticks. It prints as a worksheet or a times table chart too.
You bring Nothing 10 sec
How teachers use the math theme
Primary · arithmetic
Ten minutes of tables, a different set every time
Arithmetic sums at the class's level regenerate, so the early finishers get a fresh round instead of the answer key.
Secondary · revision
Match the expression to its value
Memory and the Matching game take a sum on one card and the answer on the other — fractions, powers, whatever the unit is.
Logic · any age
A sudoku for the whiteboard
A 2×2 with pictures for the youngest, a 3×3 for the rest, and a battle mode when two players want the same board.
Activity ideas
All ideas → Arithmetic sums
Sums that spell a sentence
Every answer is a letter. Get the sums right and the message writes itself across the top.
Sudoku
Mini sudoku
A 4 × 4 grid with one solution, and each number confirmed as it goes in. Sudoku for ages five and up.
Arithmetic sums
First sums with a secret message
Seven little sums with no number bigger than 5. Every answer is a letter, and together they spell a short sentence.
Sudoku Premium
Picture sudoku
The same logic with pictures instead of digits: one of each in every row, column and box.
Sudoku
Daily sudoku
The classic 9 × 9 at mid-week strength: one solution, no guessing, and a fresh board whenever the slot needs one.
1 Pick the generator
Sums and sudokus generate themselves; the card and sentence types take your own expressions and answers.
2 Set the level
Difficulty, operators and steps per sum for calculations; grid size and difficulty for a sudoku — previewed live.
3 Share or track
A link or QR code for the class, and with tracking on, a result per player showing which sums went wrong.
Questions about math puzzles
Do I have to write the sums myself?
Not for arithmetic sums or a sudoku — both are generated from the level you set. The card and sentence generators use what you type.
Can players see which sums they got right?
Yes — feedback per calculation is a setting, and the results page keeps every answer with tracking on.
Can a sudoku use pictures instead of numbers?
Yes — give every value an image and the board becomes a picture sudoku, in any of the 5 sizes.
Other themes
same editor, different kind of thinkingSet the level once. The sums write themselves.
Free for 60 player sessions a month. No card, no trial clock.