Piazza is an online discussion board, similar to Compass web boards or other online forums. Piazza allows for you to publicly post a question (and even post anonymously) and students, TAs, and the course instructor can work together to make a really great reply. Piazza is the only online board which you will find the CS 105 course staff online.
Since the question, answer, and replies are all public, Piazza will be a great resource when you have a question on an MP or lecture material.
From previous experience, there are some key practices that make Piazza most useful for everyone:
The CS 105 piazza requires an access code to sign up. The access code for Spring 2014
is computing
.
Course Link: https://piazza.com/illinois/fall2014/cs105/