This article presents a systematic review of research on the achievement outcomes of all types of approaches to teaching science in elementary schools. Study inclusion criteria included use of randomized or matched control groups, a study duration of at least 4 weeks, and use of achievement measures independent of the experimental treatment. A…

Fifty-nine secondary school physics students were assigned to treatment groups: (1) Project Physics units, (2) Project Physics and verbal learning unit, and (3) a training program in scientific inquiry. Posttest results revealed that, on most aspects of a science inquiry test, treatments 2 and 3 had significantly greater effect on achievement than…