Michael Schoch, Noodle Intern
That's a really important question and one that will ultimately require a very personal answer depending upon your son's needs, hopes and circumstances. What I can do is guide you towards some helpful resources written by experts in the field.
A great place to start is Noodle's Dyslexia Topic Page. The topics page will point you towards all kinds of articles and learning resources that will give you ideas of the support options available.
One of the best things you can do is try to place your son in an environment that's as academically advantageous as possible. You might start by choosing a school that is particularly effective at working with dyslexic students. The article, What Makes a School Dyslexia-Friendly? discusses how to find the right school for you.
Aside from finding the ideal school environment, you might look into resources that can be used at home. Assistive technology is available that can perform tasks like transcribe speech into text, predict words when typing, or sync text with the voice of an audio book narrator.
I hope this gives you some ideas and options. Dyslexia is extremely challenging for many students and parents, but it's important to realize that you're not alone and that there are very experienced, educated people out there who can help!