NOT A TEACHER
It's not a commonly used term. This is what I have found after doing little bit of googling:
Edit. I see that your text is similar to the one on Wikipedia. Well, I don't know if much more can be said about this.The organization uses the concept of crowdsourcing for social activism and public accountability, serving as an initial model for what has been coined as 'activist mapping' - the combination of social activism, citizen journalism and geospatial information.
Ushahidi - Wikipedia, the free encyclopedia
Student or Learner