An Android classroom, based on my humble opinion, means incorporating Android devices and apps in teaching. But why not iPad classroom?
Well, you can easily find so many relevant online resources, and they're basically the same thing, which is how to wirelessly mirror your content on the big screen in the classroom and devise handouts or worksheets with apps. Now, with the help of Miracast, building an Android classroom can be as easy as pie even for people who are not computer savvy at all.
So, what is Miracast? Simply put, it is a protocol that mirrors EVERYTHING on your Android wirelessly onto a projector or a TV screen. Then, you need to know if your Android is Miracast compatible, and the answer is usually yes if you purchase it after July, 2013.
Second, you need an Android dongle and a VGA to HDMI adaptor to connect to your classroom's projector. An Android dongle, like ScreenBeam Pro, is a Miracast receiver paired with your Android. As for the adaptor, it is used to connect the dongle to your classroom's VGA projector. That's pretty much everything you need to know about mirroring your Android.
When it comes to developing and organizing content for teaching, I use Evernote for my Butterfly S. It's a free app both for Android and iOS, containing many cool features for teachers to use like its famous counterpart, Explain Everthing. It allows you to create notes, embed images and pdf files, capture any website screens, annotate anything, to name just a few. When you create an account, you can access your storage anywhere as long as Internet connection is available.