Gary Rubinstein is an extraordinary math teacher who has a terrific blog.

His analysis of New York City’s teacher data reports shows that they are inaccurate, unreliable, and meaningless.

Any district or state official who is considering VAM should read Gary’s six posts.

If you do, you will discover there is no there there.

Please help this post go viral.

Every pundit–from Nick Kristof to David Brooks to the editorial writers–should read this analysis.