Describes the development, use, and evaluation of the "Osmosis Program" as a teaching tool to elicit and challenge college students' understanding about diffusion and osmosis. Results showed students using the program performed better on a diffusion and osmosis assessment test than students not using the program. (Author/MKR)

Described is a computer-based tutoring program that helped to improve computational performance for 16 preservice elementary teachers by effectively increasing their awareness of a tendency to divide consistently by the smaller of 2 numbers presented within division word problems. (JJK)