[turingcompeteme]

Exactly. It's not about the teachers.

My sister was an award winning teacher when she was at a good school. Now that she teachers on the edge of a reserve she has suddenly become "low performing".

Take 50 ideal teachers who have all the best training and have learned all the best techniques, and put them in a low scoring school. The test scores of the school will not improve. Most of the teachers will be focused on surviving until they can transfer elsewhere.