Evaluating Teacher Evaluations

"Evaluating Teacher Evaluations," published in Phi Delta Kappan is a great tool for understanding value-added rating models and how they fail to account for the vast number of factors that influence a student's test scores from one year to the next. Since value-added models can't control for factors like class size, home and community challenges, summer learning loss (which disproportionately affects low-income students), then there is no way they can provide an accurate picture of how effective a teacher is in raising student test scores.