Make a pile of ten items. Pens and pencils would be suitable.
Each player takes it in turn to remove one, two or three items.
The player to remove the last item is the winner.
Play the game four or five times then write down any strategies you may have found.
Are you good enough to challenge the computer at this game?
Play Simple Nim otherwise known as The Subtraction Game.
Play Multi-pile Nim otherwise known as Classic Nim.
How did you use this starter? Can you suggest
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Teacher, do your students have access to computers such as tablets, iPads or Laptops? This page was really designed for projection on a whiteboard but if you really want the students to have access to it here is a concise URL for a version of this page without the comments:
However it would be better to assign one of the student interactive activities below.