Abram’s wife Sarai gave her slave to her husband as a wife because Sarai hadn’t borne him any children. Hagar conceived, Sarai got angry and complained to her husband, who told her to do basically whatever. So Sarai mistreated Hagar, who ran away.
Here is where it gets interesting. Up until now, this is just a story of a messed up marriage. But then the angel of the Lord gets involved. The passage says that the angel found Hagar. So, God came looking for Hagar. Then the angel tells Hagar to go back and be obedient to her mistress. There is no commiserating about how mean Sarai has been. There is no complaining allowed. But there is a promise.
Sarai was wrong to mistreat Hagar. But that didn’t seem to matter much in this story. We can interpret this passage from two perspectives. As a band director, you can play the role of the mistreated servant, running away from administrators who “don’t understand,” or “do not support my program,” or “expect me to do things I shouldn’t have to do!” It may be that you are supposed to look for another job. But it also is possible that if you return to/stay in your position and follow the rules that you will eventually see your ‘offspring’ multiplied.
The other way to look at this is to see yourself as the one mistreating your ‘servants’ (musicians). Do you offer them opportunities and then take them away due to petty jealousy when they succeed? Do you impose unrealistic rules and double standards? Maybe you skip marching band rehearsals and let your staff take over, but then throw a fit when a student asks if they can have someone in the band cover for them. It may be time to look in the mirror to make sure you are not acting like Sarai. And remember, when her name was changed to Sarah, she became a mother too. Maybe consider being patient to wait for promises made to you to be fulfilled.