classes:  lecturer. Enthusiastic teachers, do not abuse slides, teachers for students to discuss themselves, do the work and then correct.  curriculum. Enthusiastic teachers, do not abuse slides, teachers for students to discuss themselves, do the work and then correct.  facility. Enthusiastic teachers, do not abuse slides, teachers for students to discuss themselves, do the work and then correct.  general. Enthusiastic teachers, do not abuse slides, teachers for students to discuss themselves, do the work and then correct.