The author has framed this brief appreciation of David Flower in terms of influence; specifically, his influence as a teacher, both in person and through his writing (most of all his attempted rewriting of much of the history of Greek mathematics). The author will also make some second-order remarks about the influence of teachers.

Discusses the responses of mathematics teachers to the use of videotape recordings of mathematics teaching as a possible solution to the problem of teacher isolation. (Contains 20 references.) (MDH)