Have Adult Students Write in All Classes!

In his keynote address today at COABE, Dr. Michael Wooten, OCTAE Assistant Secretary and Deputy Assistant Secretary, made several well defined suggestions for improving the education we provide to adult in the US.  Among those suggestions was "Have students practice writing in all of their classes!" I heartily second that idea. How about you?
 
How do students use writing in all of their classes in your program or in your work with them? What kinds of writing activities do you promote among your learners at all levels? What engages students the most? Let's talk! Leecy