When a child struggles to read or keep up, it is natural to worry about something big. Very often the cause is simple and cheap to fix.
An eye test, a hearing check, a look at sleep, and a thought about the language your child is taught in can change the picture completely. That is why every guide on this site begins with these checks.
If the simple checks are fine and the worry stays, that is the time to talk to your child’s teacher, and then to a trained professional. Free government options come first.