Yes, COOPERATIVES is a Scrabble word!

Letter values in Scrabble US: C 3, O 1, O 1, P 3, E 1, R 1, A 1, T 1, I 1, V 4, E 1, S 1.

Is it a valid word?

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

a jointly owned commercial enterprise (usually organized by farmers or consumers) that produces and distributes goods and services and is run for the benefit of its owners
an association formed and operated for the benefit of those using it

Also: co-op.