The present article considers a fundamental question in evaluation research: "By how much do program effects vary across sites?" The article first presents a theoretical model of cross-site impact variation and a related estimation model with a random treatment coefficient and fixed site-specific intercepts. This approach eliminates…

Objective: Young people in urban areas are often the focus of pregnancy and sexually transmitted infection (STI) prevention programmes because of their high risk of unwanted pregnancy and contracting an STI. Young people in rural areas are far less studied but also have a high risk of similar outcomes. This study evaluates Giving Our Girls…

This three-volume report describes the "SAM (School Administration Manager) process," an approach that about 700 schools around the nation are using to direct more of principals' time and effort to improve teaching and learning in classrooms. Research has shown that a principal's instructional leadership is second only to teaching among…

Achieve 3000 is an online differentiated reading program for students with disabilities and English Language Learners in grades 6-8. The software delivers differentiated assignments at 12 different reading levels. The software features internal assessments that continuously gauge students' reading levels, provides feedback to teachers, and…

The Learning Communities Demonstration is a national research project that is testing the effectiveness of learning communities in six community colleges across the United States: Merced College in California; The Community College of Baltimore County (CCBC) in Baltimore, Maryland; Hillsborough Community College in Tampa, Florida; Houston…

The Learning Communities Demonstration is a national research project that is testing the effectiveness of learning communities in six community colleges across the United States: Merced College in California; The Community College of Baltimore County (CCBC) in Baltimore, Maryland; Hillsborough Community College in Tampa, Florida; Houston…

Often in green communities, homeowner understanding is left out of the project. We evaluated the impact of a new environmental education program installed in a green community, Town of Harmony, Florida. Consisting of educational kiosks, website, and brochure, we evaluated whether Harmony residents' environmental knowledge, attitudes, and behaviors…

The gold standard in making causal inference on program effects is a randomized trial. Most randomization designs in education randomize classrooms or schools rather than individual students. Such "clustered randomization" designs have one principal drawback: They tend to have limited statistical power or precision. This study aims to…

The "National Guard Youth ChalleNGe Program" is a residential education and training program designed for youth ages 16 to 18 who have dropped out of or been expelled from high school. During the 22-week residential period, participants are offered GED preparation classes and other program services intended to promote positive youth…

This study was designed to establish the efficacy of Teaching SMART (Teaching Science, Mathematics and Relevant Technologies); a science professional development program for teachers with students in grades 3 through 5. Teaching SMART promotes scientific inquiry and emphasizes the importance of equity, empowerment, exploration, and fun in the…

TEACHERS IN BIOLOGY, ENGLISH, HUMANITIES, MATHEMATICS, PHYSICAL SCIENCES AND SOCIAL SCIENCES AT THE UNIVERSITY AND AT VARIOUS JUNIOR COLLEGES IN FLORIDA TESTED THE VALUE OF ORIENTING COURSES TOWARD STUDENT PARTICIPATION AND AWAY FROM LECTURES. EACH INSTRUCTOR CONDUCTED ONE CONVENTIONAL COURSE AND ONE EXPERIMENTAL, LESS STRUCTURED COURSE COVERING…