This paper advances the thesis that high level thinking in classrooms happens when students become conscious of experience and knowledge realities and decide to pursue them flexibly and creatively. The specific research focuses on the author's conviction that effective stimulators of student reflection will accommodate knowledge encounters that…

High level thinking abilities extend beyond just command of facts and concepts. More crucial is idea use and refinement through discourse encounters. Thinking in classrooms is served by dialogic teachers who understand and use the right discourse tactics and designs. Effective discourse will usually be accompanied by: (1) extended idea exchanges;…

Analyzed are the different stages in the conceptual evolution of infinity as developed historically through the work of Bolzano and Cantor. Results of a study of 18 to 20 year old's concept of infinity prior to instruction produced aspects of the passage between conceptual levels of infinity. (MDH)

Discusses the importance of teacher intervention in the use of Logo in elementary and junior high schools, emphasizing a process-oriented approach to teaching. The use of worksheets, questioning techniques, and providing a socially reflective and interactive environment are described, and a checklist to see if criteria are being successfully met…