FERPA considers Teaching Assistants to be an extension of the faculty member. Faculty members may even share their sole-possession records with their TAs. However, if other faculty and department members can inspect those notes, they are no longer sole possession and become education records. Students have the right to inspect and review those.
Directory information about a student is not regulated by FERPA and can be released by the university without the student's permission. Students can request non-disclosure from the U-M Registrar's Office.