classes:  lecturer. teachers enthusiastic, close to the focus, easy to understand, I hope the next semester will teach statistics probability.  curriculum. teachers enthusiastic, close to the focus, easy to understand, I hope the next semester will teach statistics probability.  facility. teachers enthusiastic, close to the focus, easy to understand, I hope the next semester will teach statistics probability.  general. teachers enthusiastic, close to the focus, easy to understand, I hope the next semester will teach statistics probability.