I'm an English teacher, and I almost certainly would not be had I never discovered RPGs. In my experience, it's a very common story -- of all popular hobbies, video games are one of the best for developing academic skills, so they're hugely useful for helping people become interested in learning.
I could read before I found games, but reading was a life skill and nothing more. Reading became a passion once it became fun, and video games were a huge part of that (and a building block: I started reading novels for fun too, eventually).
I'd also like to give a special shout out to pen and paper games. Not too long after I got into video game RPGs, I got into tabletop RPGs, and the language skills and imagination required for those builds a tremendous amount of confidence. For students who don't like writing fiction or reading aloud, TRPGs are an oft-overlooked tool.
Really, people underestimate the value of very simple practice. It doesn't matter that Final Fantasy Mystic Quest is pathetically easy and has a joke of a plot; the child who plays MQ every evening will be a better reader and have better mental math skills than the child who passes their evenings with the Bugs Bunny and Tweety Show.
Even as adults, the number of folks who whittle away their reading ability with TV makes me sad. I watch everything, no matter the language, with subtitles on, and I constantly hear family and friends complain that they can't read them quickly enough without taking their attention away from the image. If that's you, then you need more reading practice!
As the medium of video games has grown older, some aspects have improved, but others have definitely fallen by the wayside. I think it's harder for the kids of today to find games that really speak to them; there's too much bombardment from hyper-popular titles. But even so, I believe games can be a force for good. Games are being made every day that can enrich the lives of their players. And of course, old games will never die, never lose their value. Parents: try making positive games part of your kids' lives where you can. Kids have (and need to have!) a sense of wonder that is beautifully compatible with fantastic adventures.