classes:  lecturer. teachers have an interest in students, especially the average, weak students, arrange a schedule to teach tutoring.  curriculum. teachers have an interest in students, especially the average, weak students, arrange a schedule to teach tutoring.  facility. teachers have an interest in students, especially the average, weak students, arrange a schedule to teach tutoring.  general. teachers have an interest in students, especially the average, weak students, arrange a schedule to teach tutoring.