Describes how various components of Mathematica's complex study fit together and explains perspectives and principles related to 1) distinguishing implemented programs from intended ones, 2) ensuring broad coverage to explore competing theories of effective programming, 3) collecting...

This publication, the first major report on the Early Head Start national evaluation, focuses on early implementation experiences and tells the story of the 17 programs that helped launch the first nationwide program for low-income infants and toddlers.

This publication, the first major report on the Early Head Start national evaluation, focuses on early implementation experiences and tells the story of the 17 programs that helped launch the first nationwide program for low-income infants and toddlers.

The first-year findings reveal that while the 21st Century Community Learning Centers changed where and with whom students spent some of their after-school time and increased parental involvement, they had limited influence on academic performance, no influence on feelings of safety or on the...