Investigated was a sequence of computer-based activities on estimation with 108 students in grades 9, 10, and 12. The activities were appropriate for students at each grade level; each class improved their estimation scores significantly. (MNS)

These papers from the fifth annual meeting of the Canadian Mathematics Education Study Group are organized similarly to the meeting, presenting materials from the lectures, working groups, special groups, and panel groups, as well as ad hoc groups. Iverson delivered one lecture on computer programming, stressing the place of APL, while Kilpatrick…