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Lessons with interactive visuals, built from your own lecture notes.

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FeaturesLearn anythingQuick answers

Learn anything

Quick answers

Ask a question, get a clear answer, and carry on.

Ask anything and get a clear answer with a picture. Stop there, or turn it into a lesson.

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AnswerLesson

Dividing by ½ asks how many halves fit

3÷123 \div \tfrac{1}{2}3÷21​ asks: how many halves fit into 3? Each whole holds two halves, so three wholes hold six. That’s why dividing by ½ doubles.

Flip and multiply is a shortcut for the same count: 3×2=63 \times 2 = 63×2=6. Dividing by 13\tfrac{1}{3}31​ triples, for the same reason.

  • 1 whole½ + ½: two halves
  • 2 wholesFour halves
  • 3 wholesSix halves
So 3÷12=63 \div \tfrac{1}{2} = 63÷21​=6.

The real thing, not a picture of it. Try it.

01

An answer, not a course

Not everything needs a lesson plan. A short question gets a short answer in plain words, with a picture when one helps.

02

Pictures that fit the question

Amos draws what the answer is about: a number line, a graph, a diagram of the system you asked about.

03

Make it a lesson when you want more

If the answer opens up more questions, turn it into a lesson that starts from what you just read.

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