Inequalities are considered among the most useful tools of investigation in pure and applied mathematics; yet their didactical aspects have not received much attention in mathematics education research until recently. An important aspect of teaching problem solving at the secondary level deals with the notion of equivalence of algebraic…

This article reports the findings of Phase II of our study of student use of web-based tutorial materials for general chemistry and student understanding of chemistry concepts. We have found that students who use the web site valued the aspects of visualization of chemistry concepts and availability of materials online. In our analysis of student…

Presents graphic means of representing deductive proofs in a sentential system of symbolic logic. Provides students with performance data following a description of the rule set and the working backwards method. Shows that one interface design is superior to others in respect to working backwards. Draws some general conclusions concerning the…

Presents activities which highlight major concepts of linear programming. Demonstrates how technology allows students to solve linear programming problems using exploration prior to learning algorithmic methods. (DDR)