Graphic from www.edb.utexas.edu/resources/mathclub/magictrick
Start by performing this trick until at least some of the kids think they know the trick or are dying to know how it works. This may seem an obvious ploy but it isn't. There are teachers who will start by explaining the trick and children will lose enthusiasm for it. We've found that children lose their enthusiasm for the trick when they are creating the cards but then gain an appreciation and understanding when they perform the trick on others.
Perform magic by creating magic cards based on the binary representation of numbers.
- www.edb.utexas.edu/resources/mathclub/magictrick/ (base 2 - pdf for creating cards)
- mathdelights.org/images/stories/delights/magic/magic_cards_base10instructions.pdf (instructions for base 10 cards)
- mathdelights.org/images/stories/delights/magic/magic_cards_base10.pdf (base 10 - for young children)
- gwydir.demon.co.uk/jo/numbers/binary/cards.htm (online version)
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