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Download full textSomers, Marie-Andrée; Zhu, Pei; Jacob, Robin; Bloom, Howard – MDRC, 2013
In this paper, we examine the validity and precision of two nonexperimental study designs (NXDs) that can be used in educational evaluation: the comparative interrupted time series (CITS) design and the difference-in-difference (DD) design. In a CITS design, program impacts are evaluated by looking at whether the treatment group deviates from its…
Descriptors: Research Design, Educational Assessment, Time, Intervals
Melchior, Alan – 1998
This document reports on the conduct and findings of a 3-year evaluation of the 1995-96 school year of the Learn and Serve America School and Community-Based Programs, which were initiated to support school and community-based efforts to involve school-aged youth in community service. Well-designed, school-based service-learning programs have a…
Descriptors: Citizenship Education, Comparative Analysis, Cost Effectiveness, Educational Benefits
