Is Reform Math a Big Mistake?

Via a Linda Thomas email:

Flash cards are out. Math triangles are in.

Mrs. Potter grabbed a chunky stack of flashcards, stood in front of the classroom and flipped through them every day when I was in second grade: 6 + 6 = blank, 7 + 3 = blank, 5 + 6 = blank. In unison, we responded 12, 10, 11. Our robotic pace slowed a bit when she held up subtraction cards.

That’s so old school.

The triangles my second-grade son brought home from school this year have plus and minus signs in the middle, with one number on each point. Students learn number families. For example, on a triangle of 6, 8 and 14 students see that 6 + 8, 8 + 6, 14 – 6 and 14 – 8 are all related.

Math triangles are part of the reform math curricula taught in more than one quarter of the nation’s schools. (See article “Math Wars” for a history of U.S. math education.) Seattle’s public elementary and middle schools teach reform math. This month the Seattle School Board will hear a recommendation for a new high school math curriculum that will be reform based. A key feature of this type of instruction is an emphasis on concepts, as opposed to computations.

In a traditional classroom, solving 89 + 21 involves lining the numbers up, carrying the one and arriving at 110 as the answer. Students learning reform math would think about the problem and reorganize it in several ways: 80 + 20 + 10, or 80 + 30, or 90 + 20. Same answer, different method.

Posted by Jim Zellmer at March 4, 2008 8:30 AM
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