But professors at big schools say there is not enough time to write evaluations for each student in large classes.

VOA: special.2009.03.05

In fact,not even all professors are full professors.

VOA: special.2010.09.02

Her professors advised her not to study science.

VOA: special.2010.03.14

Assistant professors do not have tenure.

VOA: special.2009.04.09

Not all college teachers are full professors.

VOA: special.2009.04.09