Science Fiction & Fantasy Workshop: 
Portland State University at Cannon Beach, Oregon. 1983

Science Fiction on Stage Workshop: 
Playwrights Unlimited, Mill Valley, California. 1983

Clarion West Writers Workshop:
Seattle Central Community College, Seattle, Washington. 1985

Science Fiction & Fantasy: Women’s Perspective
Conference Coordinator: University of California Berkeley Extension, Berkeley, California. 1986

Writing Science Fiction & Fantasy Short Stories: 
University of California Extension, Berkeley, California. 1984-1988, 1990-1992

scripsit, a writing workshop: 
Private writing workshop. 1974-present.

Science Fiction Writing:
WritingClasses.com (Gotham Writers Workshop). 2002-

Start Writing Science Fiction:
Barnes & Nobel University. 2003-

"The instructor kept impressing me with her cool, clear-eyed responses to every student's work.  She got right to the heart of the issue, every time out."

"Marta's extensive editing experience is evident in her ability to read a student's work--even if it is unbelievable rough--and easily pick out points that can be improved, points that would remain buried except for her keen eye."

"She worked as hard as we did."