This is a subject close to my heart. I had been thinking of writing on this subject for quite some time now.
My main contentions are:
a) This need not be applied to Chinese schools: it tends to change the characters of these schools. If fully implemented, there would remain only one examination subject in Chinese! The Chinese community cannot accept it.
b) It is not too late to introduce this at secondary level. The students will still have five years to improve their English as well as their knowledge of Science through English. (These are the professed goals of this programme.)
c) It is too much a burden to the pupils and too ambitious to expect them to be able to learn 3 languages at their tender age. Most of them will end up mastering nothing, or half-past-six knowledge/skills at best.
Hope I can have some achievements in the near future.