I'm guessing you mean Jane McGonigal? Yes, she's good and she will use the term "alternate reality" but it is often relevant to the work we do with augmented reality. The terms can be a headache too because increasingly AR is used to only talk about the visual mechanic of overlaying a camera view with created graphics, but earlier education innovators used it to mean any composite reality. Things that use GPS, QR codes or even low tech mechanics.
A number of people in the forum have written a good deal about their projects about AR and formal and informal education. ARIS and arisgames are good search terms on google scholar along with AR. Also look for people using other platforms like Aurasma and Taleblazer.
A couple books that are free (PDF) or cheap (Lulu) to pick up and start reading and finding other readings are
Mobile Media Learning: Amazing Uses of Mobile Devices for Learning (2012, Dikkers, et al. Eds)
Mobile Media Learning: Innovation and Inspiration (2015, Holden et al. Eds.)
These both have a lot of stories of people using AR and related things in many settings, some of them formal. They make good and easy reading. Rather than spam you now, I'll try to come up with something a bit more comprehensive or at least extensive and post it somewhere and link back here.
Thanks for asking this question. It reminds me that we have often tried to do this and keep up with the writing about AR, but it seems to be a lesser priority. It also reminds me that its been a while since we've gotten together to tell stories like in the above books. I would be interested both in knowing what stories others have told and if there's interest in putting together a new volume. I know a lot of groups don't even have the time to put their stories to words, and so maybe I could find a way to help with that too.