Here is an activity that I created/used when I taught REP Math. I was a "Math Connections" class, so I was the second math class for kids in my school that struggled with Math. Did you read that correctly?? They struggled with math, so we gave them two math classes...yep, I was that guy!
This activity was designed to reinforce what my students were learning in their regular math class. They had to show understanding of the concepts in order to present them to the class.
The one page handout offers topic suggestions for 7th and 8th grades. It also gives expectations of what should be included and a rubric for how they will be graded.