struggles with IEP/ teaching at home

my son is 7 and non verbal in a public school. we recently had our iep meeting and it left me very frustrated. they seem hell bent on teaching him ADL's and no academics. i met with the person in charge today and explain my frustration and while she was supportive it feels like no one is listening. last years iep he was doing phonics, this year, they say he doesn't know his letters. last year he was counting to ten, this year they say he doesn't recognize numbers. every point they made or goal they set i brought up valid issues with and they agreed, but after almost a month i have seen no changes to his program or even the written iep. i asked about having someone come in to assist and they are reluctant. i am trying to teach him at home as well, but i don't know how to teach anyone to read, never-mind a non verbal child. i feel like they have written him off at 7 despite his receptive language being fine. he uses sign language, proloquo2go, pictures, gestures etc. he has over and over again worked to show that he is capable and i feel like he is giving up because it isn't being acknowledged. honestly, i don't blame him. he cant possibly understand the depth of why it matters that he learns all of this yet. i am terrified that he wont reach his potential bc no one wants to see it. i have spent most of his life doing various therapies outside of school hours (he has other diagnosis as well) and now have to add some homeschooling to that as well i guess. does anyone have any experience with this? i dont know where to begin or how to prove that he knows things...thanks