Mr. AB wrote a new math curriculum for his fifth-grade students and got great results. His friend, Mr. CD, tried the curriculum and got lousy results. Mr. AB tries to figure out why his friend, an excellent teacher, didn’t suceed with the program.

Meanwhile at Exponential Curve, Dan Greene discusses some of the things he’s trying with his algebra 2 students at Downtown College Prep. He urges math teachers to check out the I Love Math collaboration site.

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