Be careful! Mission US can take up a lot of your time if you don’t watch the clock. The current games are focused on the American Revolution and are really engaging. New ones are being developed for release later this year with one on resisting slavery coming out in a few weeks or months.
These games will not only be fun in the classroom but will work well as a fun homework option (imagine having students who won’t stop doing their assignments). Your tech-minded students will love it as will your “gamers”. If the literacy requirements make the games difficult for some learners, simply pair them up with partners before playing.