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Peabody TeachFor teachers and grown-ups

Random number generator, 1 to 20 v0.1.0

1 to 20 · 20 left
Hold Space or the button, then let go

The board: tap a number to mark it away today

The range and settings travel inside the link after the # sign, which browsers never send to any server. Numbers marked away are not included.

Space hold to roll, let go to land · 1–4 mode · R reset · S say it · M sound · F full screen · Esc leave it

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Generate a random number from 1 to 20 with a fair draw. It is a good range for teen numbers, a number line to 20 and quick turns in a class of twenty.

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How to use it

  1. The range is already set from 1 to 20. Press Hold to roll or the Space bar, and let go to land on a number.
  2. No repeats is on, so each number comes up once until all have been used. Untick it to allow repeats.
  3. For another range, type the lowest and highest numbers in the boxes, or open the full random number generator for odd, even, multiples and more.

Ideas for class

  • Draw a number from 11 to 19 on the board and ask children to say how many tens and how many ones it has.
  • Draw a number and place it on a number line to 20 on the board, then ask which numbers it sits between.
  • Pick a page, a problem or a question from a list of twenty, so children never know which one is coming next.
  • Draw two numbers and ask the class which is bigger, how much bigger, and what they make when added together.

Related

Questions

How do I pick a number from 1 to 20 without repeats?

No repeats is on for this page, so each number comes up once. The board shows the ones already drawn, and the tool tells you when all twenty have been used.

Can I draw a few numbers at once?

Yes. Set How many up to 10 and the draw gives that many different numbers in one go, which is quick for making groups or choosing the next few children to answer.

Can I choose only odd or only even numbers?

Yes. Open the rule menu and pick odd or even. The draw then uses only those numbers from 1 to 20, so you can practise doubles, skip counting or odd and even.

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