Thanks again. And thanks for the statistics as well.
I find it is difficult to increase scores for nvr once a child achieve a certain level, for example, 10/12, or 11/12. nvr is also an area that children easily make mitakes during the exam. There are a few friends' kids who passed with good scores, almost everyone got lower nvr marks compare to vr.
Do you have the same experience? Is that the natural of the two types of questions? As in vr, in most cases, if you can find an answer, you normally know if it is right.