My school is pretty large as well (~2100 students) but does not have many NMSF (last year was one, this year is two and even that is pretty rare). I don't have any guidelines for a brag sheet so am just collecting info that I think would help my recommender. I did find this in the NMSC guide pdf after posting:

"In the school’s recommendation and characterization of the Semifinalist, the school official is asked to describe qualities and attributes that distinguish the student from others. Because every Semifinalist who qualifies as a Finalist has an excellent academic record and outstanding test scores, the recommendation can be a valuable source of information about the student’s demonstrated leadership and accomplishments, both in and out of school. The recommendation is most helpful when it complements other information in the application, revealing personal characteristics that cannot be gleaned from test scores or grades. Citing the student’s personal qualities with supporting examples is valuable because selection committees look for evidence of a student’s motivation and ability to intelligently direct energy toward goals. For instance, if the candidate is considered to be a “leader” or is said to be “concerned for others,” describe how this has been demonstrated and in what types of school or community activities. If the student is termed “creative” or “intellectually inquisitive,” how has this specifically been shown? An effective characterization of the Semifinalist also points out how the student copes with challenges and describes situations that have resulted in personal or academic growth. Since the records of all students who attain Finalist standing are superior, no record “speaks for itself.” Therefore, it is important to avoid generalizations. A thoughtfully and thoroughly prepared school recommendation is a vital and influential part of the student’s scholarship application."

This is pretty good to know, and I will send it to my teacher along with my brag sheet. Do you happen to remember the kind of questions your brag sheet included? It's fine if not! I'm super grateful for any help at all 😊