Yes, PRESENTATIONS is a Scrabble word!

Letter values in Scrabble US: P 3, R 1, E 1, S 1, E 1, N 1, T 1, A 1, T 1, I 1, O 1, N 1, S 1.

Is it a valid word?

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

the activity of formally presenting something (as a prize or reward)
a show or display; the act of presenting something to sight or view
the act of making something publicly available; presenting news or other information by broadcasting or printing it
the act of presenting a proposal
a visual representation of something
formally making a person known to another or to the public
(obstetrics) position of the fetus in the uterus relative to the birth canal