Sorry, i'm not sure I can help with the dyslexia problem, but I can help with the boredom aspect. I run a local childrens football club (Muswell Minors YFC)with age groups ranging from 6 to 14. At 9 and a half years old, maybe your son would be interested in joining our under 10s coaching. This is held at the Powerleague centre (Formerly Pitz) off Trott Road N.10 on Saturday mornings 9.30am - 11.30am.
You will usually find us on pitch 10. However if you have any problem simply ask any member of staff for Darren at Muswell Minors and they will direct you to me.