Meaning

[Dinhtuong]

Could you tell me the meaning of these words ?
- Shop worker : what does this job mean?
- Professor Hill gave me "extra credit" for a good story. The words "Extra Credit" in this sentennce mean are what?
- I ate 10 pieces of chocolate today. I have no "will power". The words "Will Power" in this sentence mean are what?

Thank you for your help

[Casiopea]

[1] a person who works in a manufacturing or repair shop.

[2] additional points towards the grade

[3] no control; no power to will myself to stop eating chocolate.