- Teacher: Suci Erawati
- Teacher: Mangatas H P Hutagalung
- Teacher: Idamawati Idamawati
- Teacher: Suci Erawati
- Teacher: Mangatas H P Hutagalung
- Teacher: Idamawati Idamawati
- Teacher: Suci Erawati
- Teacher: Rapael Ginting
- Teacher: Putranto Manalu
- Teacher: Victor Trismanjaya Hulu