Thank you for sharing your working history, I was at St.Micheal primary school(聖米迦勒小學), I still remember those days, there was a hawker who was selling delicious 柴魚花生粥 outside 金文泰中學.
I am a Clementi Secondary School alumni - 1965. Yes, I graduated 59 years ago. There was only one student in the whole school who can speak Mandarin, She was from Taiwan.