students' lifetime income by more than $250,000 for the average class- room in our sample. We conclude that good teachers …Are teachers' impacts on students' test scores ("value-added") a good measure of their quality? This question has …' impacts on student achievement and (2) whether high-VA teachers improve students' long-term outcomes. We address these two …

special-need students, groups that charter critics have argued are typically under-served. The results show overall gains of 0 ….35 standard deviations in math and 0.12 standard deviations in reading for each year spent at KIPP Lynn. LEP students, special … education students, and those with low baseline scores benefit more from time spent at KIPP than do other students, with reading …

improve students' long-term outcomes. Using school district and tax records for more than one million children, we find that … the present value of students' lifetime income by approximately $250,000 per classroom …Are teachers' impacts on students' test scores ("value-added") a good measure of their quality? This question has …