Stressing that learning to write is learning to think, a series of workshops showed teachers in the content area how to use writing in their classrooms. Following a brief introduction to the program, workshop participants developed eight guidelines for creating effective writing assignments: (1) make all assignments worthwhile, (2) make them clear, (3) create assignments students could realistically accomplish, (4) do the assignments with the students, (5) insist that students write complete sentences and use their own words, (6) determine evaluation criteria, (7) grade rather than correct papers, and (8) share evaluation criteria and evaluations with students. After practice in writing worthwhile questions for students, teachers assigned writing to their classes and then gave workshop presentations explaining the rationale and procedures followed for these assignments. They asked their colleagues to grade three student papers and then defend the actual grades given. Workshop presentations covered writing assignments in biology, ecology, mathematics, French, economics, and social studies, as well as teacher writing for students. Teacher assessment of the workshops was generally positive, noting greater student commitment and motivation. Suggestions for future workshops included grouping teachers according to content areas. (Several examples of student writing samples are included.) (MM)