We examine the fundamental and complex role that time plays in the learning process. We begin by developing a conceptual framework to elucidate the multiple obstacles schools face in converting total time in school into active learning time. We then synthesize the causal research and document a clear positive effect of additional time on student…

The authors evaluated the effects of P-SELL, a science curricular and professional development intervention for fifth-grade students with a focus on English language learners (ELLs). Using a randomized controlled trial design with 33 treatment and 33 control schools across three school districts in one state, we found significant and meaningfully…

Enthusiasm for problem-based learning (PBL) is widespread, yet there exists little rigorous experimental evidence of its effectiveness, especially in K-12 populations. Reported here is a highly controlled experimental study of PBL in a middle school population. Between- and within-subject comparisons are made of students learning the same material…

This study offers one bit of evidence that quizzes written to require reasoning are more effective in attaining thinking" objectives than are recall quizzes. (Author)

Teachers' (n=78) and students' (n=2,347) perceptions of actual and preferred classroom environments were compared in 78 sixth grade classes in 43 schools in Israel. The Classroom Environment Scale was administered to all of the subjects. Teachers and students agreed more about the ideal than the real classroom. (SLD)

The effects of problem content on mathematics word problem performance were explored for 128 male and 128 female college students solving problems with masculine, feminine, and neutral (familiar and unfamiliar) cover stories. No effect of sex typing was found, and a small, but highly significant, effect was found for familiarity. (SLD)

The construct validity of 290 preadolescent children's responses to 3 instruments claiming to measure dimensions of self-concept was studied. Instruments administered to the fifth graders include the Self-Description Questionnaire; the Perceived Competence Scale; and the Piers-Harris Children's Self-Concept Scales. (SLD)

Calls for education improvement are often predicated on a decline in U.S. education. Past U.S. high school students' knowledge is examined through U.S. history test data from 1915 to 1925 and national achievement test data for 1932 to 1965. Evidence does not support a decline in student knowledge. (SLD)

Item responses of 2,380 mathematically talented junior high school students (1,437 males and 943 females) were studied to determine gender differences, using the mathematical sections of the Scholastic Aptitude Test (SAT-M). Girls excelled on miscellaneous items and data sufficiency items but performed less well on algebra items than boys. (SLD)