Teachers teach the students singing Family, teachers, students, first turn off the books so the students listen music only, then the teacher opens the CD/track 21, students listen to first.
The First Family singing teacher, student teacher closed the book. Students listen to music alone. Then the teacher opened the CD / track 21 to students before the first time.
Student teacher sing Family by first students for off the textbooks. To make the students listen to the music alone. Then the teacher open CD / track 21 students listen 1 times.