You don't have to compose the music, copy the parts, and rehearse it with your ensemble to hear a complete performance. The MIDI Sequencer can play the parts back for you which can enhance the composition process. Most MIDI keyboards can play 32 or more notes at one time providing the teacher with an excellent orchestration tool. Some teachers place a MIDI station in the practice room. Teachers can record or purchase MIDI files for student practice.
Student can then go in the practice room, load a sequence, and practice along.
Practicing with a sequenced accompaniment Students at all levels can benefit from practicing with a recorded sequence. They can practice playing with a steady beat. They also can learn to adjust the tempo for practice. Some teachers use the sequencer to challenge students by providing accompaniments of difficult literature. Exercises can also be created to help students reinforce basic skills.