Coming from the airport:
Drive in the direction of Vienna - them follow the sings to Praha (Prag). You cross the river Danube - then take the exit to Krems/Praha - A22. Before the exit Stockerau Nord (about 20 km) take the exit to Tulln and Krems - S 5. Then follow the road to Krems
As soon as you approach the city - count the traffic lights. 1st light - habour 2nd light - Landersdorf -3rd light - Krems Nord - Zwettl - B37 - take it!!
After about 1 km - take the first exit - Krems Nord - turn right at the light - pass the next traffic light - and then you will see the school on your right hand side (it is opposite McDonalds!)