Learners in a graduate course were given some behavioral objectives and took mastery test when they felt they were ready; author found they scored significantly higher on the unit and final examinations when compared to a control group. (Editor)

The traditional theoretical rationale underlying audio-visual instruction has been that the more concrete a presentation is, the more effective it will be in the instructional situation. Some researchers have questioned the validity of the above rationale. The author presents evidence that it may be advantageous to compress and simplify…

A preliminary report on performance contracting in the Wichita school district. (RY)

Educational selection methods are not infallible. A considerable reservoir of unexploited intellectual ability remains in the working class. (Author)

Reports the reactions of students to an experiment in which all students were guaranteed an A" for one grading period, and lists positive and negative effects on the class. (AL)

Discusses education voucher systems and the OEO experiment. (JF)

Discusses experiments in different school systems in New York and Massachusetts that incorporate Herman T. Epstein's theory of brain development. Many of the programs are aimed at helping teachers identify student cognitive levels and adopt techniques for reaching children at different levels. (WD)

The use of Bayesian and empirical Bayesian techniques to summarize results from parallel randomized experiments is illustrated using the results of eight such experiments from an SAT coaching study. Graphical techniques, simulation techniques, and methods for monitoring the adequacy of model specification are highlighted. (Author/JKS)

Illustrates the construction of a classroom demonstration of the moving cube illusion. Gives details for building this three-dimensional figure that appears to be a solid cube but is actually a hollow figure. Suggests ways in which this display may be used in the classroom or as a permanent exhibit. (KO)

Different visualization techniques have been used for teaching chemistry concepts. Previous studies have shown that when molecular animations and video demonstrations are used, students seem to better correlate all three levels of representation: macroscopic, submicroscopic, and symbolic. This thinking process allows the students to improve their…

Cognitive acceleration programmes, started in the early 1980s, have now been run in many hundreds of schools in many parts of the world. One important feature of these programmes is that their effects have been evaluated by following up participant students for some years after the intervention. This has provided extensive experience in the…