It know that some of the word games I post about might be blocked by school district content filters. I’ve found that our District is pretty cooperative when it comes to unblocking sites at my request — as long as I have a good reason.
I know many of these games also allow you to embed them in your own blog or website. I’m not tech savvy enough, though, to know if the games themselves would still be blocked — even if they were in a teacher’s site. I haven’t bothered to experiment since I have so many games on my website under Word and Video Games that enough of them are accessible.