Mom Seeking Advice About Learning Disabilitiy Dslexia

My son who is 7 years old is doning terrable at school to say the least he really tries and he is very sweet and never gives up but he just doesn't get it, letters sounds how to write tthem etc. How do I help him?? What products are out there for this I want him to succeed and feel apart of everything right now, he is just in his own world. He is very hard to communicate with I have to repeat my self many times for him to do anything... Help