PS 147 Mini-Reunion
1 hour ago
NY Times on teacher ratings: "Margin of error" is "35 percentiles in math and 53 in English, the city said." Garbage in, garbage out.
Maximum margin of error for a teacher's percentile ranking on
#TDRs is 75 in math and 87 in ELA
According to the formula, Ms. Isaacson ranks in the 7th percentile among her teaching peers — meaning 93 per cent are better...What you would think this means is that Ms. Isaacson’s students averaged 3.57 on the test the year before; they were predicted to average 3.69 this year; they actually averaged 3.63, giving her a value added of 0.06 below zero.
Unless I can't read plain English, this says that the 40 percent devoted to test scores overrides the other 60 percent. In other words, 40 percent is equal to 100 percent.
...if a teacher scores very low on both the state measure of learning and the local measure of learning — 0, 1 or 2 out of a possible 20 in both components — they will not be able to make the cut score out of the ineffective rating, no matter their score on the measures of teacher performance. Given that there are two different measures, and at least one of them can be an authentic assessment of learning rather than a standardized exam, it is hard to make a convincing argument that a teacher who scores so poorly on both measures is effective in the classroom...
...what amounts to 20 times the number of observations previously required for veteran teachers – including those she knows are excellent – sometimes to the detriment of her other duties.
"At the very end, it shows a little kid on this airplane looking out and smiling," he says.
"But this system has not been tested, has not been tried. I'm not willing to put my kid on board this plane."
"...with liberty, and justice for all. Please be seated."