How did Escalante set high expectations and model behaviors consistent with meeting those expectations? Check all that apply.

He worked hard to qualify to teach high school after immigrating to the United States.

He teaches summer intensive classes and AP Calculus classes.

He tells the class, $$You$$re going to work harder here than you$$ve ever worked anywhere else.$$

He says of his students, $$It$$s not that they$$re stupid. It$$s just they don$$t know anything.$$