Mattermost is an open source communication tool that facilitates collaboration in a chat-type environment.
But really, come try it out: https://bit.ly/openetc
Learn all about it, including:
Sandstorm makes installing a web application as easy as an app on your phone.
from elementary to secondary
A community field experience student from Faculty of Education at UBC created this CC-licensed document mapping Sandstorm apps from OpenETC to BC Curriculum. Using anonymous apps Sandstorm can be used in classrooms!
Calvin and Hobbes Copyright Bill Watterson