From the passage, the schoolmaster glared on Master Scrooge with a ferocious condescension. This means that the school master looked at him in a fierce and supercilious way.
Celestial as used in this passage means something relating to the sky, i.e. heavenly.
The schoolmaster drove gaily down the garden - sweep. This means that he drove cheerfully and merrily.
You can help them by sticking up for them or saying something to the person whos bullying. You can aslo tell an adult or someone whos close or call 911 if it's a really bad situation.
