From The Next Web article:
Applications that are in the Play for Education store are sorted by age and genre. So, users can find math-based applications that are appropriate for their kindergartener, who wants to learn more math.
However, what is most interesting about Play for Education is the ability for administrators to send out applications to their entire tablet fleet. So, if a school wants to send an app to their 200 Nexus 7 devices, they can do so, by simply inputting the group’s name. The app will be pushed out by Google.