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Unlu, Fatih; Layzer, Carolyn; Clements, Douglas; Sarama, Julie; Cook, David – Society for Research on Educational Effectiveness, 2013
Many educational Randomized Controlled Trials (RCTs) collect baseline versions of outcome measures (pretests) to be used in the estimation of impacts at posttest. Although pretest measures are not necessary for unbiased impact estimates in well executed experimental studies, using them increases the precision of impact estimates and reduces sample…
Descriptors: Mathematics Instruction, Intervention, Pretests Posttests, Curriculum Design
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Bennett, Donald G. – 1977
In an effort to lessen the social and economic dysfunctions many California farm workers suffer because of the migratory and seasonal nature of their jobs, a three-phase study was conducted to research, develop, and implement a new career system for the farm worker. During the project's first phase, a job task analysis was conducted on four…
Descriptors: Agency Cooperation, Agricultural Laborers, Career Development, Career Ladders