qcalculate for teachers
Everything here is free, needs no accounts and collects nothing about your students. Use it to show the method on the board, give out practice, warm up a lesson or print a worksheet.
Show the method on the projector
Type the numbers from your lesson into a calculator and press Full screen under Show me how. The working builds one step at a time, with pictures you can pause, replay and step back through, at half speed if you like.
Long division · Fractions · Percentages · Quadratic formula · Standard deviation
Practice with a link for every problem
New problems at three levels, checked instantly, with feedback on the usual mistakes and hints that reveal one step at a time. Copy link to this problem gives the same problem to the whole class.
Long division practice · Fraction practice · Percentage practice
A five-minute warm-up
The daily math puzzle has five problems, from easy to hard, the same for everyone each day. Students get two tries at each and see the worked answer afterwards. Their shared result shows squares, not answers.
Printable worksheets
Make a worksheet on long division, fractions or percentages, with 10, 20 or 30 problems and an answer key on its own page. Each answer links to its worked solution, and the sheet’s link prints the same sheet again.
Put a calculator on your class site
Copy one line of code to embed a calculator in your class website or learning platform. It shows the steps too, and links back to the full version.
Answers you can trust
Answers are worked out with exact arithmetic, using fractions rather than rounded decimals, and rounded only at the end when a decimal is needed. The steps come from the same calculation as the answer. Read how we check our math.
Lesson ideas
- Long division with remainders: show 1001 ÷ 7 on the projector, pausing before each step to ask the class for the next digit. Then set five medium problems from practice and finish with a printed sheet.
- Why we need common denominators: put 1/2 + 1/3 in the fraction calculator; the bars show both fractions cut into sixths. Ask students what goes wrong if you add the tops and the bottoms; the practice checker explains that mistake when it sees it.
- Percentage change in the news: take a real price rise, work out the change in the percentage calculator, then reverse it: why doesn’t a 20% fall undo a 20% rise?
- Spread in data: enter the class’s own measurements in the standard deviation calculator and watch the deviation table fill in, then compare with the mean, median and mode.
Privacy in the classroom
Students don’t sign up or log in. What they type stays in their browser: streaks and puzzle results are saved only on their own device, and we don’t collect names or answers. Pages that children are likely to use show only non-personalised ads, if any. See the privacy policy.
Tell us what your class needs
Which topic should come next? Is a level too hard, or a hint unclear? Send us a note; requests from teachers decide what we build next.