Investigated proportional reasoning of a select group of older, college-bound adolescents on a task set in a geometric/spatial context with a multiple-proportion, multiplicative structure. Sex-related differences and the influence of course experience in mathematics and science were also investigated. (JN)

Data from 60 observations of 10 teachers and 10 each of their students showed that type/quality of teaching strategy predicted 37 percent of variance in engagement and that the more indirect the teaching strategy, the greater the students' involvement in learning tasks. Implications of these and other findings are discussed. (Author/JN)

Investigated is the extent to which students' nonscientific beliefs change by comparing before and after instruction as a function of students' reasoning skill. Nonscientific beliefs discussed include special creation, orthogenesis, the soul, nonreductionism, vitalism, teleology, and nonemergentism. (KR)

Investigated the development of formal reasoning among students (ages 10-18 years) from predominately White, middle-class communities located in rural, suburban homogeneous, and suburban heterogeneous areas. Results indicate clear differences among communities in formal reasoning ability. Implications for using science instruction to promote…

The purpose of this study was to examine the effects of three instructional methods and conceptual systems orientation on achievement in a freshman general chemistry laboratory course. Traditional approach, learning cycle, and computer simulations are discussed. (KR)

Investigated changes that occurred in sixth- and seventh-grade teacher and student discourse when teachers endeavored to implement extended teacher wait-time in a sequence of seven lessons related to probabilistic reasoning. Results indicated that teacher wait-time increased from an average of 1.9 to 4.4 seconds during the lesson sequence. (JN)

Determined if grouping preservice elementary teachers (N=91) in physical science laboratories by their formal reasoning ability affected: (1) their science content achievement; (2) the learning environment in the laboratory; (3) their formal reasoning ability; and (4) the relationship between individuals in a particular group. (Author/JN)