The cloud is affecting how teachers see the classroom
Teachers are incorporating cloud tools and content into instruction in ways that change how they interact with students both in and outside the classroom. They are no longer limited to face-to-face instruction or constricted by class schedules. Instead, teachers are using both tools that are imposed by administrators and more ad-hoc resources.
Source: How teachers see the classroom redefined by the cloud | Ars Technica
Here are a couple of examples of how teachers are using the cloud in their classrooms.