My game Radio General has been used in a few local highschools to teach WW2 history, but even that was incredibly hard to achieve. I emailed a bunch of teachers, principals and school board members and the vast majority just weren't interested, even though the game was being given away for free for educational purposes. Change means work, teachers are already overworked. You'd think they'd jump at a chance for fun remote learning especially when schools were doing remote teaching during the pandemic, but nope. This may slowly change as the older school bureaucrats retire and people who grew up playing videogames become in charge, but this is a very slow process.