Are you looking for a general student reflection sheet? This self-assessment rubric is fun and general enough for any class. It works best in art classes or project-based classes, but I can see regular elementary teachers using it in their class as well.
I use this in my art classes for students to reflect on their work habits and successes midway through the year. It is great to have at parent-teacher conferences, so parents can see reflections from their child.
This is a 2 page document. The first page is simply circling the emojis to answer the questions. The second page has reflective questions for the students to answer using their own words. I would use this with grades 3-6.
For a younger kids' self-assessment, check out Student Self-Assessment for Younger Elementary