List member John shared this huge collection of free math lesson starter ideas. There are 366 different activities, one for each day of the year. There work well with children aged from 8 to 16 as most of them are quite open ended or allow the teacher to vary the level of difficulty.
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The URL: http://bit.ly/1fOJXx9
Thanks
Here are more suggestions that you can try in your math class:
http://www.mathtricks.ca