Middle School Art Lessons Doodle Design
The inspiration for this lesson comes from Hillcrest Christian School's Artsonia page.
Here's one listed for grades 6 - 8 at the blog, "A Faithful Attempt". She gives lots of detailed instructions and photos of this lesson. (Update: I am having trouble linking to the exact page, so when you go to her blog, search for "Black and White Doodle Design." You will find great directions there.)