@peazs - oh nono. My grandma was riding the scooter while I was sitting in the back; this was a long, long time ago.
Your question: In Surrey, residential streets are 50km/hr unless stated otherwise by a regulatory sign (black and white).
For your school zone question, I think the "proceed with 30km/h" when making a turn only applies when you're still in the school zone (haven't passed the second school zone sign). If you've already passed the second school zone sign, then you can accelerate to the posted speed.
Maybe give your instructor at PRS a shout; I sent Chris an email about right turns before my exam and he answered

Very helpful. LOVE PRS staff