Short starters and puzzles

A collection of short starters and problems; each problem is designed to fit into 10/15 minutes, but many can be extended to fill a longer time. Some problems are topic-specific, while others are more general number, algebra and problem-solving.
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This page is simply an index of all the short starter activities I currently have uploaded and are optimised for whiteboard display.  

If you are looking for something topic-specific, try the Resources by Topic section.