In a group, there will be at least 3-4 students, one teacher, and, in the best possible setting, one keyboard per student. This setting automatically puts the teacher in a completely different situation than when she or he teaches students one by one. All of the students in a group class have to be engaged in what is happening in the class and take part in the learning process.
Verses Private Lessons
Private lessons are one-on-one. There are strong interpersonal relationships between student and teacher (and parents for young students) that is needed to keep the students progressing well.
Both groups learn about intervals, scales, and melody.