In my class, the students are required to conclude their current events presentation with a thought-provoking question to stimulate conversation in the classroom. I evaluate the presenter on certain agreed-upon criteria, but also the other students need to show evidence of critical thinking and expression of their own opinion and ideas.
This is great for differentiated instruction/assessment as well. You could easily ask students to fill a certain number of sections, or assign different questions for students, depending on what you wanted to evaluate. I hope you like it!