By far, one of the mist political aspects of teaching today, is new teacher evaluation systems that often use student test scores to evaluate teachers. The literature/research has much to say about this with the overwhelming evidence that there is no validity to such. Several links are below with respect to this topic:
What Does the Research Say About Value-Added Models and Teacher Evaluation?
Study: State Value-Added Performance Measures Do Not Reflect the Content or Quality of Teachers’ Instruction
Can Value Added Add Value to Teacher Evaluation? by Linda Darling-Hammond
Teacher evaluations at the schools that Obama, Duncan picked for their kids
Value Subtracted Gov. Cuomo’s plan to tie teacher evaluations to test scores won’t help our public schools.