classes:  lecturer. not for extra exercises, whole revised examples in slides and corrected quite quickly, students hard to keep up.  curriculum. not for extra exercises, whole revised examples in slides and corrected quite quickly, students hard to keep up.  facility. not for extra exercises, whole revised examples in slides and corrected quite quickly, students hard to keep up.  general. not for extra exercises, whole revised examples in slides and corrected quite quickly, students hard to keep up.