By public transportation:
Get off at the Centrumboulevard stop, Utrecht. From this stop, it's approximately a two-minute walk. You can also take the train to Utrecht Leidsche Rijn station. From the station, it's about a ten-minute walk.
The number of parking spaces around the school is very limited. In Leidsche Rijn Centrum, paid parking is enforced from 9 am to 9 pm.