Answer:

srs

Answer	Crossword Clue
SRS	AARP members
SRS	Campus VIPs
SRS	Last yrs.junior class

SRS	SAT takers
SRS	Name appendages
SRS	They're worried about SAT's
SRS	Yearbook sect.
SRS	Soon-to-be alums
SRS	They're worried about SAT scores
SRS	Last yrs. junior class
SRS	AP test takers

SRS	They may let their second semesters slide: Abbr.
SRS	They're two years past sophs
SRS	Orch. instruments
SRS	Skip day organizers: Abbr.
SRS	Student gp. with an "-itis" characterized by laziness
SRS	Cap-and-gown renters (abbr.)
SRS	June grads.
SRS	Some promgoers (abbr.)

SRS	Last year's jrs.
SRS	Grads-to-be (abbr.)
SRS	Commencement gp.
SRS	Next yr.'s alumni
SRS	Grads-to-be
SRS	Many SAT takers
SRS	Imminent grads
SRS	Coll. short-timers

SRS	Graduating class: Abbr.
SRS	Coll. hopefuls
SRS	Many 18-yr.-olds
SRS	Many AARP members
SRS	Many promgoers: Abbr.
SRS	Some coll. student
SRS	Some coll. students
SRS	Some gown wearers: Abbr.

SRS	Some H.S. attendees
SRS	Some upperclassmen: Abbr.
SRS	They have an "itis" named after them: Abbr.
SRS	"Pomp and Circumstance" marchers: Abbr.
SRS	H.S. graduates