hmm, my experience is with deaf students who go directly to deaf schools since childhood, not those who were mainstreamed and then enrolled into a deaf school. a few years ago, i saw that many deaf schools' curriculum were subpar compared to my high school's curriculum. i do not know if it has improved today. also, i found a fundamental flaw when i went to the maryland school for the deaf a few years ago: a teacher was teaching english via ASL. i thought that was obscure, lol. then again, i wouldn't know what other methods they'd employ - maybe SEE ;o
when i was speaking of parents, i wasn't referring to hearing parents refusing to learn sign language. i was referring to deaf parents that fail to reinforce the english language throughout the house, thus lacking constant stimulation of english.