Category Archives: Algebra

Geometric Subitizing: A Different Kind of Number Talk

These Geometric Subitizing Cards have been in beta the past two years. I asked our buddy Joe Schwartz to take them for a test drive last spring and he reported back.  Joe’s all in. How do they work?  Let’s play… Last week I took them for … Continue reading

Posted in 3-5, Against the Norm, Algebra, counting, Fact Fluency, Making Math Accessible, Math Tools, Number Sense, Strategy Development | 26 Comments

The Post-it Holds the Mystery Number

There’s no denying the power of the Post-it.  Many brilliant minds within the #MTBoS have harnessed its’ power to help students make sense of mathematics and this week was no different. Only this time we infused them into a Marilyn Burns must have… … Continue reading

Posted in 3-5, Algebra, Making Math Accessible, Number Sense, Strategy Development | Tagged , , | 16 Comments