Do not capitalize the season when writing about semesters.
He is taking a lighter load for the spring semester than he had during the fall.
The cadet plans to take 12 hours of classes during fall 2014.
freshman
Do not capitalize terms pertaining to class years unless part of a formal name.
Freshman Convocation
Sophomore Leadership Seminar
Plural: freshmen.
Note that “freshman” is singular when used as an adjective.
The freshman orientation was well attended.
[Tip: if unsure, replace with another class as a test. You would not write “the seniors class trip” so do not write “the freshmen class trip.”]junior
numbers
In general, write out numbers one through nine. Use figures for 10 or above and whenever preceding a unit of measure or referring to dates, military units, ages of people, animals, events or things. Also in all tabular matter, and in statistical and sequential forms.
He is 5 feet 6 inches tall.
The cadet gave his little brother the top three reasons to attend The Citadel.
She has a 6-year-old.
Her daughter is 4 years old.
Yesterday 1st Lt. Smith gave the command.
senior
Do not capitalize terms pertaining to class years unless part of a formal name.
Senior Class Carnival