Hi Missk,
You can ask about the size per class. When I called the Singapore branch, we were already on waiting list. Thus, don't have to ask about the number enrolled.
They should be able to tell you how many students in the playgroup.
Silvery,
You must be referring to the Singapore branch. Yes, SJCK is very popular. We have parents sending kids there from Jurong West, from Chinatown, etc. Can see that they don't mind sacrificing the sleeping time of the kids.
Haha! I'm one of them too. I'm residing at Upper Bukit Timah.