Chrome App for schools

Our middle school at Collegiate School in Richmond, VA are 1:1 Chromebook and use Arduinos extensively with Macs in the classroom, which has proven problematic at best. We'd like to use our Arduinos with our Chromebooks, but are currently unable to even install the app and try it out, let alone purchase it, which we are very interested in for at least 100 users. Our domain extension, though Google Education, is not @gmail.com, but @collegiate-va.org. Could this be source of the issue of not being able to install? I've attached a screenshot of this from the Chrome store. Please advise.