According to @nberpubs, statewide Tobacco 21 (#T21) laws that prohibit the sale of tobacco products to people under the age of 21 appear to be having their intended outcome of reducing youth tobacco use.

Alex Cohen is the Director of Learning and Evaluation for the Richard M. Fairbanks Foundation. High-performing school leaders have a substantial impact on student achievement. Studies that aim to isolate the impact of leaders on student test scores find that moving from a low- to a high-quality principal can mean several additional months of learning. […]