• Spell out numbers from one to nine; use figures for 10 and above. This includes ordinal numbers: first, not 1st; 20th, not twentieth, unless in an official title.
  • Use figures for school grades, e.g., Grade 3 (note cap G on Grade).
    Students start thinking about university in Grade 9.
  • Use figures in ages standing alone after a name.
    Dr. Smith has a daughter, Jessica, 5.
  • Note that Level designations take Roman numbers:
    The student is in Level III.
    She just finished Level I.
    Here is the Level I handbook.