Students Interested in JC
The link below gives a detail explaination of the syllabus you will learn in JC.
http://www.seab.gov.sg/SEAB/aLevel/syllabus/school/2007_GCE_A.html#H
Besides GP (General Paper), PW (Project Work), and MTL (Mother Tongue Languages) at H1, students are required to offer 3 H2 and 1 H1 content-based subjects, at least one of which is a subject from a contrasting discipline.
(This citeria varies for different JC.)
Below link is for the cut-off points in 2005. For your own refernce.
http://sis.moe.gov.sg/schinfo/html/JCAggregateRange.htm
Hope this helps. Ms Ho.