Among 440 early childhood teachers, half were randomly assigned to take a 14-week course on effective teacher-child interactions. This course used the Classroom Assessment Scoring System (CLASS) as the basis to organize, describe, and demonstrate effective teacher-child interactions. Compared to teachers in a control condition, those exposed to…

Results from a meta-analysis of findings from 52 studies of ability grouping carried out in secondary schools are reported. This meta-analysis provided precise, quantitative estimates of the size of grouping effects. (Author/PN)

Regions of significance in aptitude-by-treatment-interaction studies are examined by the traditional statistical approach and an alternative approach which integrates: (1) testing for the parallelism of two or more regression lines; (2) testing for their identity; and (3) Scheffe's theorem. (Author/RL)

Johnson-Neyman, Potthoff, and Erlander and Gustavsson techniques for obtaining confidence regions for the difference between regression surfaces are compared. (DG)

Undergraduate males of different achievement orientations received either no feedback or success feedback on six tasks. On later tasks, success feedback had: (1) no effect on learning easy tasks; (2) positive effects on learning difficult tasks for high achievement orientation subjects; and (3) negative effects with low achievement orientation…

The effects of teacher behaviors comprising lesson organization on student achievement were investigated in undergraduate students. Two instructional conditions were proper versus manipulated sequence and explicit organization behaviors present versus absent. Explicit organization had a significant effect on achievement. No significant…

The effects of examples used with application adjunct questions on concept learning were evaluated. Results indicated that application adjunct questions did not produce significantly higher performance on criterion questions than no-question treatments. Matched adjunct questions produced higher levels of performance on criterion than unmatched…

Sixth graders at three reading ability levels were trained in the three types of question answer relationships: text explicit, text implicit, and script implicit. Repeated measures multivariate analyses of variance on two passages indicated that the training enhanced students' understanding of task demands of questions and their answer quality.…

Student ability and behaviors during small-group interaction as mediators of effective small-group learning were examined. Comparison of test results indicated that students trained in small-group interaction participated in more task-related interaction than control students, and task-related interaction enhanced achievement and retention.…

As hypothesized, less advanced students benefited most from a high instructional support treatment (personalized system of instruction) used in an introductory calculus course. Furthermore, as level of prior mathematics preparation increased, the achievement differences between the high and low instructional support (lecture) decreased. (Author/CP)

Two teachers each taught a 2-week fractions unit to two classes of grades 4-5 students. Each teacher taught one class using direct instruction and the other using a small-group variation of direct instruction. Regression analysis on achievement showed significant aptitude-treatment interaction (ATI) and significant teacher effects. (Author/RL)

Subjects were classified as external or internal. About half of the externals (internals) were given a traditional method of instruction. The remaining subjects were involved in a contract grading plan. Using an achievement posttest, a strong disordinal interaction was found, with internals performing better under the contract grading plan and…

Achievement and attitudinal effects of three mathematics instruction methods directed in varying degrees toward accommodating diversity in student performance levels were compared in two randomized field experiments with third- through sixth-grade classes. Treatments included Team Assisted Individualization, Ability Group Active Teaching, the…

The effectiveness of three methods for teaching social studies concepts were examined. The techniques were Merrill and Tennyson's model, Gagne's model, and reading-recitation. Student achievement was assessed for each method. Results indicated definitions and both examples and nonexamples facilitate concept acquisition. (Author/DWH)