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Colabrador is an instant collaborative board for the classroom, and it's the result of a two-day hackathon at Fronter/Pearson.

The idea was making a prototype of a tool to let a teacher ask a question in class and get students to send their answers on the spot. The teacher can then hook the computer to a projector and show the answers (with the submitter's name or not), move them around with drag and drop to group them, delete the ones that aren't relevant, and write summary notes of the whole process.

After this, there's no persistence: all that work is just for that particular moment and it's never saved.


You need a tool called Leiningen to run this program. Download it, and then run lein run from this directory. Once it's running you can go to a browser and open http://localhost:9090.

You can kill the server at any moment pressing Ctrl-C. That will make the server forget all submitted answers.


The current prototype has many shortcomings:

  • There's no real authentication. Using teacher as your name will give you "teacher access", and using any other name
  • The question is currently hardcoded.
  • The HTML pages have many common parts that are currently duplicated.
  • There are design issues in some mobile platforms.
  • Changing from anonymous to public mode does not keep the position of the answers.
  • The code in general could be improved.
  • There's currently no "export" option for the result of the session.


Instant collaborative board



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