Kirstin Greig
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CGI Math


Black Box Fractions

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Using Andrew Stadel's 3 act task, Black Box Fractions, my students analyzed a short video and discussed what they noticed and what they wondered about the fractions. After solving the task, students created their own Black Box Fractions using Google Drawings.
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Screencasting

Students used iPads to create screencasts explaining their strategies in an equal share fraction problem. Students had the opportunity to justify their strategies. CGI math: questioning, understanding student thinking


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Number lines are way more fun when you can write on your desk! This is a modified version of Irvine Math Project's Fraction Race game. Students practice adding fractions on the number line and "race" to the finish line.

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Comparing fractions using sticky notes and yarn number line #clotheslinemath ​

My students love Which One Doesn't Belong puzzles. Students can find multiple correct answers and shift their focus to justifications and arguments for their thinking.
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