don't know about hands on, but...
I use a simple graphic organizer of a wedding tent with a happy bride and groom under it. You could use anything, doesn't have to be marriage. Anyway, the main idea/topic sentence goes up in the triangle part of the tent. There are three legs holding up the tent - turn the paper sideways and write one supporting detail on each leg so that the tent doesn't collapse and crush the happy couple. Some of them have a hard time connecting the details and the main idea - if they do, I ask them verbally why they think their main idea is true. If they can't tell me, they probably don't feel strongly enough or know enough about it, and I have them think of something else to write about. The kids each draw their own tent to save copies, and they like having an excuse to draw. After they fill in the graphic organizer, they turn it into a paragraph, finishing it up with a "sum up/wrap up" sentence that restates their main idea. I also use the same g.o. to help them find the main idea and supporting details in other people's paragraphs.