The Implementation and Evaluation of Comprehensive School Guidance Programs in the United States: Progress and Prospects

The evolution of guidance in the schools of the United States from a position to a service to a program is described. Then the prevailing structure for guidance, the comprehensive guidance program is presented. This section of the article provides a brief overview of the basic elements of the program. Finally, the article closes with discussion of guidance program evaluation as well as presents the results of several studies that offer evidence of the impact of guidance programs. This revised version was published online in August 2006 with corrections to the Cover Date.     

Differentiation of Learning Processes within Ability Groups

This paper describes a mediational model for conceptualising the relationship between individual differences and academic achievement and presents the results of a study concerning some predictions of that model. According to this model, intervening or mediating variables mediate between stable personological traits (e.g. mental abilities) and task performance. Mediating variables are thus transitory and situation‐specific to some degree, and in academic tasks, are represented by the learning process complex, which consists of motives and strategies for learning. The mediational model predicts that students’ information processing abilities will help determine the number and the nature of learning processes differentiated within the learning process complex. Results conform to the model's predictions, indicating that (1) as students’ processing abilities increase, they show greater learning process differentiation and (2) for students intermediate in differentiation, the learning processes that do emerge are dependent upon which processing abilities they possess. These results are discussed with respect to their implication for the mediation model and for strategy instruction.     

Improving science teachers' conceptions of nature of science: a critical review of the literature

This paper aimed to review, and assess the 'effectiveness' of the attempts undertaken to improve prospective and practising science teachers' conceptions of nature of science (NOS). The reviewed attempts could be categorized into two general approches: implicit and explicit. Implicit attempts utilized science process-skills instruction or engagement in science-based inquiry activities to improve science teachers' conceptions of NOS. To achieve the same goal, explicit attempts used instruction geared towards various aspects of NOS and/or instruction that utilized elements from history and philosophy of science. To the extent that teachers' NOS conceptions were faithfully assessed by the instruments used in the reviewed studies, the explicit approach was relatively more effective in enhancing teachers' views. The relative ineffectiveness of the implicit approach could be attributed to two inherent assumptions. The first is that developing an understanding of NOS is an 'affective', as compared to a 'cognitive', learning outcome. The second ensuing assumption is that learners would necessarily develop understandings of NOS as a by-product of engaging in science-realated activities. However, despite the relative 'effectiveness' of the explicit approach, much is still required in terms of fostering among science teachers 'desired' understandings of NOS. The paper emphasizes that explicitness and reflectivness should be given prominence in any future attempts aimed at improving teachers' concepts of NOS.