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 …

needn't capture treatment effects for students who haven't applied to charter schools or for students attending charters for …. Students enrolled in the schools designated for closure are eligible for "grandfathering" into the new schools; that is, they … attendance: the grandfathering instrument compares students at schools designated for takeover with students who appear similar …