Mark Weber aka blogger Jersey Jazzman is a veteran teacher and a doctoral candidate at Rutgers University.

He wrote an open letter to a state senator in New Jersey who was angry that Governor Phil Murphy reduced the stakes attached to PARCC testing in relation to teacher evaluation.

State Senator Ruiz mistakenly believes that evaluating teachers by test scores is sound practice. She is wrong.

Weber reviewed the research demonstrating the invalidity of such measures.

By the way, New Jersey is one of the very few states that still mandates the PARCC tests. It originally was offered by 24 states. Only six states and DC still are in that small group.

You might find this to be a valuable resource for understanding why it makes no sense to evaluate teachers by the test scores of their students.