Answer:

APLUS

Answer	Crossword Clue
APLUS	Super-excellent grade
APLUS	Excellent mark
APLUS	Top grade

APLUS	Unbeatable grade
APLUS	100, in a sense
APLUS	It's in the upper 90s
APLUS	Superexcellent
APLUS	Incomparable grade
APLUS	Mark of excellence
APLUS	Top mark
APLUS	Mark of distinction

APLUS	100%, as a grade
APLUS	Topnotch
APLUS	Great grade
APLUS	Distinguished mark
APLUS	Letter grade equivalent of 100
APLUS	Highest grade
APLUS	Stellar grade
APLUS	High grade

APLUS	Prof's tip of the hat
APLUS	Very high mark
APLUS	Marvelous mark
APLUS	High mark
APLUS	99 or 100, say
APLUS	Report card triumph
APLUS	Enviable mark
APLUS	Outstanding

APLUS	Distinctive mark
APLUS	Very good grade
APLUS	Superb grade
APLUS	Very high grade
APLUS	Exceptional grade
APLUS	High exam grade
APLUS	Super grade
APLUS	Exceptional mark

APLUS	Highest mark
APLUS	Super-exceptional
APLUS	Best possible mark
APLUS	Mark of excellence, or another title for the puzzle
APLUS	Best grade