classes:  lecturer. Enthusiastic teachers, dedicated to work, easy to understand slides, exciting learning activities, always answering all questions of students about the lesson.  curriculum. Enthusiastic teachers, dedicated to work, easy to understand slides, exciting learning activities, always answering all questions of students about the lesson.  facility. Enthusiastic teachers, dedicated to work, easy to understand slides, exciting learning activities, always answering all questions of students about the lesson.  general. Enthusiastic teachers, dedicated to work, easy to understand slides, exciting learning activities, always answering all questions of students about the lesson.