Describes an experiment which relies on the experimentation-discovery method of learning. (SB)

Describes a set of experiments whose aim was to devise a means of getting employees to better understand the problems of supervisors. Results are described and discussed. (AN)

Speculates about the presence of a negative Hawthorne effect on a control group in addition to a positive effect on the experimental group in an experiment involving 2 first-grade teachers and their classes, and draws implications for studies which seek to control for possible interference by positive and negative Hawthorne effects. Bibliography.…

Looks at lessons learned from the Alum Rock voucher experiment and at the current politics of educational vouchers. Condensed from a report of the same name, published by the Center for Social Organization of Schools, The Johns Hopkins University (Report No. 307, March 1981). (Editor/SJL)

Indicates the range of purposes and variety of settings in which design experiments have been conducted, delineating five crosscutting features that collectively differentiate design experiments from other methodologies. Clarifies what is involved in preparing for and carrying out a design experiment and in conducting a retrospective analysis of…

Explores how the emerging goals, approaches, and methodologies of design experiments might be productively combined with methods of inquiry common in more traditional laboratory science, considering the potential benefits of such a dialectic. Presents three examples of collaboration and describes steps toward productive exchange (identifying…

Rolling dice and tossing coins can still be used to teach probability even if students know (or think they know) what happens in these experiments. This article considers many simple variations of these experiments which are interesting, potentially enjoyable and challenging. Using these variations can cause students (and teachers) to think again…

Although prior research has shown that generating explanations encourages students to learn new content with deeper understanding and to monitor their own comprehension more effectively, helping students learn how to explain properly remains a significant challenge. This study investigated the use of software agents as learning partners in an…

Two experiments explored whether children's correct answers to counter factual and future hypothetical questions were based on an understanding of possibilities. Children played a game in which a toy mouse could run down either 1 of 2 slides. Children found it difficult to mark physically both possible outcomes, compared to reporting a single…