Imo there arent good or bad schools in the netherlands, They are all fine.
I jump always on Texel (the small island on the north) because i love the view and vibes. There is 1 other very big dropzone: paracentrum teuge.
Nothing wrong with them either.
If youre going to live in Rotterdam, consider the dropzone in Rotterdam... Ive never been there, but some friends say it's a cool place.
So:
Www.paracentrumtexel.nl
Www.paracentrumteuge.nl
http://www.skydiverotterdam.com
And parachute.nl for more information, since there are a few more dropzones in the netherlands.