- <>07 - Seventh grade 
- <>25 - Postsecondary Post-Baccalaureate Student 
- <>IF - Infant (0 to age 2) 
- <>AS - Associate Degree 
- <>28 - Postsecondary Master's Degree Student 
- <>31 - Postsecondary Bachelor Preliminary Year 
- <>AD - Adult 
- <>22 - Postsecondary Sophomore 
- <>P0 - Pre-Kindergarten Level 0 
- <>DD - Doctoral Degree 
- <>EM - Employment 
- <>29 - Postsecondary Doctoral Student 
- <>12 - Twelfth grade 
- <>30 - Postdoctoral Student 
- <>0K - Kindergarten 
- <>PK - Pre-Kindergarten 
- <>HS - Attended high school, but did not graduate. 
- <>P1 - Pre-Kindergarten Level 1 
- <>01 - First grade 
- <>EL - Elementary School 
- <>23 - Postsecondary Junior 
- <>NO - None 
- <>MD - Master's Degree 
- <>P4 - Pre-Kindergarten Level 4 
- <>PD - Professional Degree or Certification 
- <>04 - Fourth grade 
- <>VR - Varsity 
- <>26 - Postsecondary Non-Degree Graduate Student 
- <>IN - Intramural 
- <>HG - High School Graduate or Equivalent 
- <>20 - Non-Degree or Temporary Undergraduate in Postsecondary school 
- <>P2 - Pre-Kindergarten Level 2 
- <>02 - Second grade 
- <>VS - Vocational School 
- <>27 - Postsecondary Professional Student 
- <>P5 - Pre-Kindergarten Level 5 
- <>05 - Fifth grade 
- <>08 - Eighth grade 
- <>SS - Secondary School 
- <>11 - Eleventh grade 
- <>33 - Postsecondary Masters Qualifying Year 
- <>PS - Some Postsecondary (e.g., college) 
- <>P3 - Pre-Kindergarten Level 3 
- <>UN - Ungraded 
- <>PC - Postsecondary Certificate or Diploma 
- <>03 - Third grade 
- <>21 - Postsecondary First Year Student 
- <>24 - Postsecondary Senior 
- <>PF - Professional 
- <>MS - Middle or Junior High School 
- <>06 - Sixth grade 
- <>BD - Baccalaureate (Bachelor's) Degree 
- <>10 - Tenth grade 
- <>32 - Postsecondary Fifth Year Student 
- <>09 - Ninth grade 
- <>C2 - Medical Test (Trial)