The following is a phrase that Don Quixote says referring to the wise man Frestón, who he thinks stole his house and his library. He explains in your own words the meaning of what he says.
"But after all, their evil arts have little power against the goodness of my sword."
I think you are correct, but It may is “Son las tres y cuarenta y cinco” or “ Son quince para las cuatro”
La clase español is right
La escuela is school in Spanish