We investigated whether three interventions -- studying incorrect worked examples, studying correct worked examples, or receiving feedback -- improved children's 0-1,000 (Experiment 1) and adults' 1 thousand--1 billion (Experiment 2) number-line estimation precision relative to a no intervention control group. At pretest, participants estimated…

Although several studies have documented the effects of statewide private school choice programs on student test scores, this report is the first to examine the effects of one of these programs on college enrollment and graduation. Using data from the Florida Tax Credit (FTC) Scholarship program, we find that low-income Florida students who…

The English Language and Literacy Acquisition--Validation (ELLA-V) study was a five-year evaluation of a program that provided professional development, coaching, and curricula that targeted English-as-a-second-language (ESL) instruction for teachers of K-3 English learners (ELs). ELLA-V was implemented in 10 school districts in Texas in the…

In the first study, using a randomized experiment to measure the impact of school vouchers on college enrollment, Matthew Chingos and Paul Peterson, professor of government at Harvard University, examine the college-going behavior through 2011 of students who participated in a voucher experiment as elementary school students in the late 1990s.…

The National Board for Professional Teaching Standards (NBPTS) assesses teaching practice based on videos and essays submitted by teachers. We compared the performance of classrooms of elementary students in Los Angeles randomly assigned to NBPTS applicants and to comparison teachers. We used information on whether each applicant achieved…