I just finished highschool. The most discussed topics were: (
1) the price of the croquette rolls; see
this site to understand what a 'kroket'/croquette and what a 'frikandel' are; (
2) The war in Iraq (or: Bush is stupid); (
3) How long it would take before the new teacher would quit with his/her job; (
4) Whether one of my best friends really loved his girlfriend, or only her piano.
Religion isn't really a hot topic at Dutch schools - except Islam that is. We just can't stop talking about Islam it seems.