New Education Tools from Windows 10

In this session we discuss the differences between Skype and Skype for Business and how both of these tools can be used to great effect in the classroom.
Can you use this platform similar to instant messenger for online businesses where users can chat, call and video other users? Restating question: Can a business integrate the Skype features within the business for it's customers?
How many persons can be engaged per session. I mean, can the class be taught with the teacher and 27 students at the same time? Would it be possible to have all of them on video?
If so, can they interact with each other? (active microphone, sharing screen and chat)
We are really interested in using Skype for classes.
Thanks