Big news last week as the New York City public schools published rankings of its 18,000 teachers. A huge step forward for teacher accountability.
Here's the deal:
1.Student learning can be measured with frequent and varied assessments.
2.Yes, the current testing is in a primitive stage, with wide margins of error. But that will improve.
3.Teachers should be evaluated on how well they help students learn.
4.Teachers consistently in the bottom 5% of all teachers should be let go.
5.Teachers consistently in the top 5% of all teachers should share their techniques with other teachers.
In New York City around 600 teachers were found to be consistently in the bottom 5% and about the same number consistently in the top 5%.
The student learning measure is value added assessment, which means it only measures the learning gained, or lossed, during a given year.