I've attended Serangoon Malay School from 1965 ~ 1970.
Located at Aroozoo Avenue. The school closed at the end of 1978.
I'm sad that this school was not mentioned in your article (part 1 to part 4).
Fyi, this school already existed in the Singapore Road Directory 1954 . However I am not sure what year it actually started.
I hope you will consider including this school in your next article (part 5, if any).