What is this app do, can we write some diary in ths app, answer

Lisha’s teacher usually includes lots of comments on student tests to them understand why their answers were incorrect.

How do television stations and newspapers in the political process?

What is the meaning of calculated as it is used in this sentence from "ups and downs"? he calculated that the ride would be over before she could finish the ice cream sundae he bought her. a estimated b solved c analyzed d clarified