http://www.seab.gov.sg/eservices/iERS/Registration.htmlÂ
here the link
The 2013 Singapore-Cambridge GCE N(T)-, N(A)-, O- and A-Level
registration period is 16 calendar days (including Sunday),
starting on 11 March 2013 until 11:59 pm on 26 March 2013.
The estimated time required to complete the application is about 30
minutes.
You need the following information before registering online: