University of California, Berkeley (UC Berkeley)

(change school)

Are you a professor?

Click here to create & join classes

Welcome to Piazza!

Piazza is a free platform for instructors to efficiently manage class Q&A. Students can post questions and collaborate to edit responses to these questions. Instructors can also answer questions, endorse student answers, and edit or delete any posted content.

Piazza is designed to simulate real class discussion. It aims to get high quality answers to difficult questions, fast!

The name Piazza comes from the Italian word for plaza--a common city square where people can come together to share knowledge and ideas. We strive to recreate that communal atmosphere among students and instructors.

Your Fall 2011 Classes:

We see you're new to Piazza!

Check your inbox for your confirmation email. Enter the validation code below so you can access your classes!

Validation Code:


Uh-oh! Invalid code.

Not Getting Our Email?

Please check your bulk mail or spam folder first. Click here to resend the email. (It may take a few minutes to arrive.)

If it's still not there, please email us at team@piazza.com for help!

Enrollment Requires a School Email

Please enter your berkeley.edu or ucb.edu email address to enroll. We will send an email to this address with a link to validate your new email address.



Please enter a valid email address

Uh oh! Your email addresses don't match.

Thank you for adding your classes!

Your classes are not yet active.
We'll notify you when they've been activated by your professor.