Writing Across the Curriculum Clearinghouse
Provides resources for teaching writing, designing assignments, scholarship, program design and more.
Across the Disciplines
A journal devoted to language, learning, and academic writing, publishes articles relevant to writing and writing pedagogy in all their intellectual, political, social, and techological complexity.
Teaching Guides from Colorado State University
These guides are designed for writing teachers and for teachers of other subjects who want to use writing and speaking activities in their classrooms.
Good Writing Assignments=Good Thinking: A Proven WID Philosophy
PDF of an article for writing in the disciplines by Roland Stout of The University of North Carolina at Pembroke.
Ten Tips for Designing Writing Assignments
There are lots of resources that talk about how to design a writing assignment, and this doesn't cover everything, but they are good ideas to keep in mind when designing assignments.