Hi Harald, it depends on what you are looking foe really. English, American, French, German...the lot. We have a schools for many different nationalities. United World College is one of the best though hard to get in. Both English and A erican families go there. Tanglin Trust is also very good for the English curriculum. Dulwich College from the UK is also opening in August 2014. GEMS academy is also opening. Marlborough college is also just across the border which a lot of children go to from Singapore. All the best.
There are lots of schooling options for expat kids in Singapore.
Our Education and Schools in Singapore page gives you a great overview of the various options and our Singapore Schools Guide provides more detailed information and insight.
Let me know if you have any more questions.
Shantalie