This article goes to show that difficult students exist at every level (from primary school to University), and different teachers react differently to such challenges. Of course, the Hwa Chong female teacher doesn't have the same authority as this US college professor to do as he did, so she has to be somewhat more careful in her response (MOE doesn't always have the back of the teacher).
http://www.tnp.sg/news/world-news/us-professor-fails-his-entire-class