Is There a Way to List Writing Recommendation Letters on a CV? As a PhD Candidate, I've written several successful recommendation letters for students who I've taught in my classes. Is it worthwhile to include this information on a CV, say under "Service"? I've never seen this included before on a CV, but I was hoping there might be a way for me to highlight my contributions to teaching outside of the classroom.
I have not seen this and wouldn't recommend it, I would not consider writing recommendation letters to be under academic "service."

If you specifically mentored particular students then it makes sense to note that mentorship, but if they were just people who took your class then writing them recommendations is just part of your teaching responsibility, it doesn't mean anything for your qualifications if your students were successful when you wrote them recommendations, those are your students' accomplishments rather than yours.