When I was in mainstream schools with other deaf students, we wanted to learn to sign ASL as ASL was and still is our primary language but the principals and the teachers do not approve of us using sign language for us to learn so that we can use ASL interpreters to help us understand in hearing classrooms.
They won't allow it at all. So if ASL is not giving out to the high schools with other languages, then the public schools are
wrong to do that for both deaf and hearing students. It is up to the students to make the choice if they want to sign ASL or other speaking languages.
That was why I got frustrated not being able to understand in the hearing classrooms in spite of lipreading which is not 100%, only about 30% that the deaf student can make out and lot of guess work. It was and is still not good to lipread.