"Mental work" recorded in primary mathematics classes as part of the Classroom Interaction Process is not a simple, single activity of drill or quiz but a set of overlapping activities with different functions. A more analytical approach to mental work is advocated to enhance its usefulness as a classroom activity. (Author/SJL)

Twenty-seven supplemental lessons for primary students involving mathematical thought problems on addition, subtraction, and comparison (e.g., greater than and less than) are presented. Each of the lessons contains 10 or more problems which students either hear or read and then respond to either orally or on written answer sheets. The materials in…

Many elementary teachers who have taught time-telling skills would propose that the mathematical skills associated with time-telling are among the most difficult for young students to learn. This booklet was developed to relate some of the concepts of time to physical models, providing methods for isolating specific time-telling concepts within a…