To determine whether teachers, on average, improve in their effectiveness as they gain experience in the teaching profession, this brief summarizes the key findings from a critical review of the relevant research. A renewed look at this research is warranted due to advances in research methods and data systems that match student data with…

With the U.S. facing a national teacher shortage that is projected to grow substantially in the coming years, school systems across the country are grappling with the challenge of building and maintaining a high-quality teacher workforce for all students. While school leaders and policymakers might be tempted to solve shortages by focusing solely…

Without changes in current policies, U.S. teacher shortages are projected to grow in the coming years. Teacher turnover is an important source of these shortages. About 8% of teachers leave the profession each year, two-thirds of them for reasons other than retirement. Another 8% shift to different schools each year. In addition to aggravating…

Do teachers continue to improve in their effectiveness as they gain experience in the teaching profession? This paper aims to answer that question by critically reviewing recent literature that analyzes the effect of teaching experience on student outcomes in K-12 public schools in the United States. This report reviews 30 studies published within…

Teacher shortages have been worsening in California since 2015. Growth in teacher demand as the economy has improved has collided with steep declines in the supply of new teachers, leading to significant increases in the hiring of underprepared teachers, especially in districts serving high-need students. Shortages are most severe in special…