Once they have established a written summary, students than create their own, independent "shelf" out of paper.
I have them add 5 vocabulary words to one triangle (I tell them to think of words that a 3rd or 4th grader might not know because you always have those couple kiddos who "know all of these words, they aren't even hard." grrrr....ha!)
In the second box, they illustrate the event or create a symbol to represent what they summarized. Finally, the third triangle should include their final summary.
I really like how these turn out, and I like the independent reflection the students have to put into of the historical event. I find that it helps them remember it better. They could be used for anything - reflecting on a reading story, historical event, scientific discovery/method, etc.