Do your students like music? Of course, they do! So take advantage of something they're already interested in to get them to write!
While I read Wonder by RJ Palacio with my students, I regularly print out or project the lyrics to the songs referenced in the novel (easily found online). We talk about and analyze each song, trying to determine how it relates to the novel and why RJ Palacio selected it. They love analyzing the lyrics and hearing the songs played in class.
But then to engage the students even further, I allow them to select their own song, something they like and feel relates to Wonder, and then prove it to me! I let the students play their songs in the classroom to share with their peers. Rubric is included. They love this project.
Please check out my TpT store for additional Wonder products, as well as lots more!