esmummy:About Schoolhouse by the Bay.....
My daughter was there from N2 till K2 and my boy is there in K2 now.
The school underwent a major management change about 2yr ago. The former principal, along with some good teachers, left to start Childfirst at M Square.
There has been many changes, not all of them good. I'll give you my take on the good, bad and ugly....
Good:
1. True bilingual immersion: one day entirely mandarin, next day entirely English so all teachers and lessons for the day will be in one language or the other. I don't know if any other preschool that has that... Most will have one Eng and one Chinese teacher in the class and if the child is more comfortable in say, English, then he will preferentially seek out the english teacher. In SHBTB, they are forced to use Chinese on alternate days and you can see even expat kids managing conversational mandarin.
2. Most of the teachers are pleasant, caring and responsible. I cannot speak for all.
3. Large enough rooms, a proper canteen, 2 or 3 open spaces/playgrounds and use of the huge CC gym/hall and dance studio.
4. There are observation rooms where you can watch your kids from behind a one way mirror, anytime of day or even the whole day if you wish. This open policy shows confidence and gives a reassurance that mere words lack.
5. Their full day programme has improved in terms of focus and content.
Bad:
1. Class size is huge! My boy's K2 class has 28 kids with 1 main teacher and one assistant teacher.
2. Food provided is usually refined carbs.... White bread, coco pops, juice out of a packet.... But hey, you can always BYO 
3. I only share my experience with their teaching, which may differ from other parents' opinions. I cannot give them credit for teaching my kids to read. Their emphasis on phonics is weak and they rely on sight words to teach reading, something I don't agree with. At K2, my girl still couldn't read until I took matters into my own hands.
Maths is passable. No fancy stuff like abacus or speed counting, but no issues there. Did not do number bonds in preparation for P1.
Chinese is good. They do di zi gui, han Yu pin yin, character strokes etc...
I did consider taking my son out this year because they suddenly doubled his class size and some other issues irked me. But since it Is his last year and it would be too disruptive, I decided to stay on. That said, his current teachers are pretty good, and if it weren't for the class size, I'd still recommend the school.
Just heard that they brought on board Patricia koh ( founder of Pat's) as the program director 3 mths back..
And they are gunning for sparkle by next yr..
Hopefully , there will be new changes to make the school better.