Such a cool idea! This will help each student feel important, needed, and supported in the classroom. I would maybe allow other students to write complements for their peers as well (but make sure that everyone is included, not just a few people). This can also help to create great bonds between students and teachers. Everyone wants to feel important!
First Grade Goals Skill Sheet (1st Grade Common Core Standards Overview)
This skill goal sheet that is a fun and very visual way for the kids to see what first grade skills they have mastered. When a skill has been mastered, the child can put a sticker in the box. Excellent motivation to meet first grade goals.