How to get to NIWI

From Schiphol Airport
Take the train to Amsterdam RAI Station (15 minutes) and there metro 51 direction Central Station, one stop called Overamstel (5 minutes). From that direction NIWI is on your left hand behind you. 

From Amsterdam Central Station. 
Metro 51 direction Poortwachter 6 stops (Overamstel). NIWI is on your rigth hand before you. 

For the metro (and trams) you need a "strippenkaart". You can buy the strippenkaart at the railwaystation or tabaccoshops. From RAI-station it is 2 strips, from central Station 3 strips. 

NB.  In the metro you can't buy a ticket, in the tram you can.

From the Owl hotel  
Take tram 2 or 1 to the Central Station. (20 minutes)

From the Lancaster  
Take metro 51 from Waterlooplein (4 stops)