It is nice to know who care...
I want input, may throw words a advise and you decide...
Most important is listen what child is upset from school due peer pressure from teacher or whatever reason. For example; not understand why he get trouble for what... that something to pay attention.
About Reading...
I encourage you to start sign as you should sign correct... if he not sign right, don't pressure.. it part of process learning until correct sign. Also give basic book with lot visual without word for start. For example point monkey and sign monkey and point at one a time. My advise about those story ensure you will tell story word to word. If you want him to learn speak, if not speak clear and it can be worthless. Due, I have see parents force kid to learn and do speak which I heard sound not clear. I do not like to see hearing behind their back and mock due speech incorrect.
Again, ALWAYS! ALWAYS check on child to write sentence like... "write a letter to your grandma what you want for birthday." Always check on sentence if the sentence alert or not clear. Due the teacher doesn't always tell you some teacher who passive to teach and ensure deaf student get proper educate and they do tell you. When my parent discover that I don't write very well or not reading. I start able read when I was 14 years old.
My weak area is past and present...
Also, word some advise to give your child to read novel book not regular book due not right sentence in some author wrote the book. I don't see nothing wrong but novel is better maybe one time a year unless he is interesting read book.
I can understand you concerned about child future because you should! Also word of advise about scholarship include that part of his future too.
Keep that mind, we have better technology such as videophone, you can look
Sorenson VRS® or
Viable.net Homepage and so on. So it can use for child benefit in right age or when he start make friend with hearing people that will start key input communicate...
Remember... do your best and let child know that you are doing your best. Let child know if he need anything and let you know.
Good luck