Thank you - THEMES is a new one for me, I'll have to look into that. I'm familiar with RAFTs and have used them frequently. I take them to the lab to simulate quite often, and we use the online essay scorer that came with our textbook adoptions, so I feel fortunate in that respect. In class, we spend considerable time gaining exposure to different prewriting strategies like the grocery list using the list, link, and number strategy - I just haven't been able to come up with an equivalent strategy on the computer.
If our state writing prompt was on computer, I would give my students some acronym tools to use to help them type some ideas down before they begin. Obviously, you would have to teach them how to delete the acronyms before submitting.
RAFT = Role, Audience, Format, Topic
What is my role? Who is my audience? What is my format? What is my topic?
If, it is a persuasive prompt, you could teach them about THEMES. How would this issue impact our society via Time, Health, Education, Money, Environment, and Safety?
I would also have them practice their pre-writing in a computer lab, a simulation, so they "feel" the process before typing their essay.
These are just some initial ideas which come to mind.