A recent experience illustrates its effect upon top students. Early in the fall of the 2007-08 school year, Sullivan noticed that half a dozen of her 21 students had exceptionally high math scores on the MAP test.
Sullivan and Kym Davick, another third grade teacher who also had students with high math scores, devised a plan to challenge those students, including Davick 's daughter, Anika, a student in Sullivan 's class.
Before each unit of the regular math curriculum, all students took a test to see what they already knew.
Those who scored high enough were sent into an accelerated program. For example, in a unit focusing upon measuring lines and volume, the high-flying students were given more complex problems.
The flexible grouping worked.
MAP tests this spring showed that all students ' math skills progressed well, and the skills of Anika and many of her peers advanced nearly twice as many points as would have been expected for students with similar skills.
"This group did amazing things because we were diligent about the instruction, " Davick said. "That 's what 's happening everywhere. "
It takes time to develop these sorts of strategies, as teachers become familiar with the power of the tools they have at their disposal.
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