A chance for the better.

Assigned

Commitment

Culture shock

Nonprofit

Stand in my way

Sets them apart

Cover their own airfare

a promise to give time and energy to something

shows that they are different

pay for their own plane ticket

a feeling of confusion or anxiety when in a new and different place, such as a foreign country

be an obstacle or a reason not to do something

sent to a particular place for work

not established to make a profit; a charity organization in this context.