We present the design principles for a new kind of computer system that helps students learn algebra. The fundamental idea is to have a system based on the microworld paradigm that allows students to make their own calculations, as they do with paper and pencil, without being obliged to use commands, and to verify the correctness of these…

Discussion of the use of multimedia programs in writing labs or classrooms focuses on the use of "HyperStudio" in high school sophomore advanced English classes for students' research projects. Highlights include computer writing lab activities; teaching strategies, including small group demonstrations, printed instructions, and…