Growth Model Work Group narrows decision to two
South Dakota’s Growth Model Work Group is down to the final two models, and most members say they would be comfortable with either model being adapted for use in South Dakota.
The Residual Gain Model is used by Minnesota, but not a lot of other states, and while it’s simpler and easier to explain, the method is not as sensitive. The Student Growth Percentiles Model is used by Colorado and several other states.
The two models have several similarities, and Shelley Billig, with REL Central, says while the results will likely look similar, the math behind them is different.
Group members expressed concerns about the sensitivity of the results especially when it comes to smaller schools and groups that might be “on the bubble” so to speak. The group opted to run data sets through each system before making a recommendation based on the final two options.
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