Yes, TECHNIQUE is a Scrabble word!

Letter values in Scrabble US: T 1, E 1, C 3, H 4, N 1, I 1, Q 10, U 1, E 1.

Is it a valid word?

TECHNIQUE is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a practical method or art applied to some particular task
skillfulness in the command of fundamentals deriving from practice and familiarity