Square the two short sides, then add them together.
Dyslexia
Read aloud · Easy Read
Less reading. Chalk talks and draws, and Easy Read mode uses simpler words.Less reading. Chalk talks and draws.
Chalk talks your child through their GCSE subjects, one step at a time. It was made for children who learn differently. When they get stuck, it gives a hint, never the answer.Chalk is a tutor that talks. It helps your child one step at a time. It gives hints, not answers.
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This is a real lesson, playing live. Try asking for the answer yourself.Watch a lesson. Try asking for the answer.
Pythagoras' theorem
Oak National Academy · AQA GCSE Maths · Geometry and measures
Key points
1. The longest side is the hypotenuse
It's opposite the right angle.
The next point appears when Chalk says it.
Geometry and measures5 of 12 lessons mastered
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Square the two short sides, then add them together.
Read aloud · Easy Read
Less reading. Chalk talks and draws, and Easy Read mode uses simpler words.Less reading. Chalk talks and draws.
Step 2 of 4
What's 4²?
Short steps · Calm screen
Short steps, check questions along the way, and a screen with no adverts or pop-ups.Short steps. A calm screen.
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Every lesson follows the same four steps, so there are no surprises. Typing works as well as talking.The same four steps every time. Typing is fine.
Slow down · Repeat anything
Slow the voice down, pause, and repeat any part as often as your child needs.Slow it down. Repeat any part.
Sam has maths homework. He's read question 3 twice and still isn't sure what it's asking. You're making dinner and can't sit with him right now.
A right-angled triangle has two shorter sides of length 3 cm and 4 cm. Using Pythagoras' theorem, calculate the length of the hypotenuse, giving your answer to an appropriate degree of accuracy.
Sam takes a photo of his homework. Chalk finds the questions on it, and he ticks the one he's stuck on. The rest can wait for another time.
Chalk talks him through question 3 out loud and draws the triangle. When he gets tired and asks for the answer, Chalk gives a small hint instead, and a question that gets him moving again.
Just tell me the answer
ChalkHint
Square the two short sides first. What's 3²?
9… and 4² is 16
Chalk
Great. Add them, then find the number that times itself to make it.
Sam gets to 5 cm by himself. Later, you open his lesson history and see exactly what Chalk said, how he answered, and which websites it used.
Pythagoras' theorem
Homework question 3 · 17 minutes · 3 websites used
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Up to 3 children, each with their own history. See the topic, when it happened, how it went and where the lesson came from. Their homework is kept here too.See every lesson for each child.
Chalk's safety checks are fixed rules, not decisions the AI makes. They run on every message, typed or spoken.Chalk checks every message first.
Nothing worrying, so Chalk sees it and asks a question back. Your child does the working.Chalk asks a question back.

Nothing worrying, so Chalk sees it. A rule in the software means it gives a hint, never the answer.Chalk gives a hint, never the answer.

Caught before the AI sees it. The lesson pauses, the Childline number appears, and the lesson is flagged for you to read.The lesson pauses. Your child sees a helpline. You can read the lesson.

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Chalk gives a hint and waits, so your child does the thinking.Chalk gives hints, not answers.
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Chalk is for GCSE learners in England, roughly ages 11 to 16. It was made for children who learn differently, and works for any child who wants patient help.
That's fine. Your child can type everything instead, and everything Chalk says also appears as words on screen.
No. If your child gets something wrong or asks for the answer, Chalk gives a hint or asks a question to help them think.
No. You hold the account and can add up to 3 children. Children under 13 never need their own account.
Chalk is free while we test it, and we don't ask for card details. After that it will be £19.99 a month for the whole family.
Everything your child says or types is checked first. If something worrying comes up, the lesson pauses and your child sees the Childline number. The lesson is flagged in your account, so you can read it and decide what to do next.