Supporting changes in undergraduate science, technology, engineering, and mathematics (STEM) instruction requires an understanding of the relationship between STEM instructors' conceptions and practices. In this study, the authors used the Teacher-Centered Systematic Reform (TCSR) model as a framework to understand how instructors' conceptions are…

We investigated the intersectional nature of race/racism and gender/sexism in broad scale inequities in physics student learning using a critical quantitative intersectionality. To provide transparency and create a nuanced picture of learning, we problematized the measurement of equity by using two competing operationalizations of equity:…

Although the practice of giving examples is central to the effective teaching and learning of science, it has been the object of little educational research. The present study attends to this issue by systematically examining the exemplification practices of a university professor and his students' learning experiences during a biology lecture on…

This study examines how a first-year biology teacher facilitates a series of whole-class discussions about evolution during the implementation of a problem-based unit. A communicative theoretical perspective is adopted wherein evolution discussions are viewed as social events that the teacher can frame intellectually (i.e., present or organize as…

The present article discusses the design and impact of computer-based visualization tools for supporting student learning and representational competence in science. Specifically, learning outcomes and student representation use are compared between eight secondary classrooms utilizing The Connected Chemistry Curriculum and eight secondary…

Reports a study comparing direct instruction with discovery teaching on learning disabled (n=10), behaviorally disordered (n=6), and nonhandicapped (n=91) students' science achievement. No significant differences were found in the immediate posttest scores for mode of instruction. Discovery learning students outperformed others on a retention test…

Tests O. R. Anderson's theory of kinetic structure of verbal communications by administering lectures on swine flu to high school biology students and then reteaching the lectures with increased commonality. Results weakly support Anderson's theory. Implications are made for training teachers to increase the commonality of their lectures. (CS)

Uses videotaped lectures and interviews to understand lectures in a physics course for prospective elementary teachers. Reports that the professor staged Aristotle, natural philosophy, and students' observations and intuitive knowledge in opposition to Galileo, controlled experiments, and mathematical inscriptions. Concludes that this form of…

Presented is a study in which students' intellectual reasoning development was evaluated following instruction that emphasized formal operations in a traditional lecture format. Results indicated that formal-operational students had significantly more success in the three reasoning areas than transitional students and transitional students had…

Determined differences between lecture-demonstration and small-group laboratory approaches on students' (N=74) chemistry achievement and attitudes toward science. Findings indicate that students taught by the laboratory approach achieved better on immediate/delayed posttests than students taught by lecture-demonstration method. More desirable…

Investigated is the effect of organization and accuracy of detail in instructional aids on the achievement of college students (N=54) in a freshman chemistry lecture course. It is indicated that aids may impede learning by decreasing students' involvement in auditory and semantic encoding during lectures. (Author/DS)

Compared the laboratory method versus lecture method for Nigerian grade eight students (n=210). High achievers in both groups had identical achievement, but the low achievers in the laboratory sections performed better than students receiving the lectures. Females receiving lectures performed better than the males receiving lectures. (PR)

Our main goal in this study was to explore whether the use of models in molecular genetics instruction in high school can contribute to students' understanding of concepts and processes in genetics. Three comparable groups of 11th and 12th graders participated: The control group (116 students) was taught in the traditional lecture format, while…

Reports on a study intended to compare the effects of two methods of instruction designed to teach preservice elementary teachers to acquire and retain integrated science process skills. Results indicated that the self-instructional method was significantly more effective than the teacher-directed method. (TW)