Meaning he will help you out.
The teacher *is writing* on the chalkboard.
Advertising
To be exposed
It comes from the fact that telephones all used to ring to signal an incoming call.
Origin "up a storm"
No
There are two separate idioms:1) To give someone a hand (with a chore), or to lend a hand -to give assistance with a task, to help out2) To give someone a hand (applause), or to give them a big hand -to clap your hands in appreciation of a performance
Palestinian and Persian
affrica (iraq
grab a bite
It was in 1960 in America