If you want to see how basically meaningless these teacher evaluations really are, check out the graphs in these posts: http://garyrubinstein.teachforus.org/201

If you want to see how basically meaningless these teacher evaluations really are, check out the graphs in these posts: http://garyrubinstein.teachforus.org/2012/02/28/analyzing-released-nyc-value-added-data-part-2/ http://garyrubinstein.teachforus.org/2012/02/28/analyzing-re... The evaluations of the same teachers teaching the same subjects in two different classes are almost completely uncorrelated. The distribution of the scores on the scatterplots look almost random. It's a travesty that perfectly fine teachers are being publicly shamed based on these unreliable metrics.