I agree that planning repertory for student orchestras is a challenge. But also remember that there is a lot of un-famous music that is not so second-rate. There are some lovely pieces that you, the players, and the audiences will enjoy discovering. Based on my experience, I’d suggest that you take a look, if you haven’t already, at Bizet’s L’Arlésienne Suite, the works of Gluck, and some early Mozart (except where the horn parts are very high). Other colleagues will know works I am unfamiliar with. You might check on opportunities to meet other high school or college orchestra conductors or to join relevant professional associations.

I also have to admit that I was fortunate when I conducted secondary school students because I was at a conservatory. Therefore, I could consult with students’ individual teachers at will, and the teachers used their lesson time to help students with the works we were working on. (I also learned a great deal that has served me very well since then.) If you have any opportunity to work with instrumental teachers, you should find that gratifying.

Happy programming.