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Accessing the Classroom

Your classroom will be available prior to the beginning of class. If you are new to Art of Problem Solving classes, we recommend that you visit the classroom sometime before the first class day to make sure you are able to sign in.

On the first day of class, we will have an instructor available 20-25 minutes prior to the start of class to allow students to test out the classroom and to answer questions about how the course will operate.

After the first class, we recommend that you always sign into class approximately five minutes early to account for any difficulties you may experience in connecting, especially if you are connecting from a new location.

Once you are in the classroom, you will also want to know how to navigate the classroom.

How To Access The Classroom

To access the online classroom, students must be signed into the site with their AoPS username. They can do this by clicking the "Sign In / Join" link on the upper-right corner of this page. Once signed in, students can access the online classroom in a few ways.

After following any set of steps described below, the classroom should open automatically in a new tab or window of the browser. If the classroom does not load, please follow the Troubleshooting guide below.

From the Online School menu (any time)

  1. Click on the Classroom link that appears when hovering over the Online School menu at the top of the screen.
  2. If necessary, select the appropriate class name. (This will only apply if you are enrolled in more than one course. For most students, this will not be necessary.)

Below username (any time)

  1. Click on the Classroom link that appears in the menu when hovering over your username in the upper-right corner of most AoPS pages.
  2. If necessary, select the appropriate class name. (This will only apply if you are enrolled in more than one course. For most students, this will not be necessary.)

Course homepage (any time)

  1. Visit the Course homepage for the course that you wish to enter the classroom for.
  2. Click the the blue "MY CLASSROOM" button that appears near the top-right of the page.

Orange bar at the top of the page (during class time only)

If you are signed in and enrolled in a class that meets within the next 10 minutes, an orange highlighted bar will appear at the top of most AoPS pages. Click this bar to be taken to the class named in that text.

Online Classroom Troubleshooting

Below are some recommendations for how to fix the most common classroom problems.

Classroom Connection

In order to use the classroom, you must have a well-maintained computer and a stable connection to the Internet and to United States-based Internet servers.

If you're having trouble getting or staying connected to the classroom, here are a few suggestions:

  1. Double-check that you are signed in to
  2. If you are unable to connect to the server, you likely have a network firewall, Internet Security software, or Parental Control software blocking access to our classroom. Try disabling these and then try to connect to the classroom again. Note that public locations, such as libraries, schools, hotels, and business offices, may have our classroom blocked; in this scenario, you will need to contact their network administrator in order to gain access.
  3. If you find that you keep getting disconnected from the classroom, this may be an issue with your wireless router. Please try to connect to the classroom via a wired Internet connection. This issue may also be caused if you are trying to sign in via two browser instances, such as phone and computer, two browser tabs, or two different browsers. In this case, please close all but one of any browser windows which may be trying to connect to the classroom, and use just the remaining window to attend class.
  4. If you are still unable to access the classroom, please try a different browser. For best performance, we recommend Google Chrome, available at, or Mozilla Firefox, available at
  5. Ensure that you are not trying to sign in from two devices, such as a phone and computer, at the same time. If you started the class on your phone or tablet, and switched to your computer, make sure you have completely exited the phone or tablet's browser, otherwise it may try to reconnect, keeping you from staying connected on your computer.
  6. If all else fails, try rebooting your computer and starting over from the beginning. This step has been shown to solve many issues.


To view images and problems, you need to have access to our image server, which you can test with the following URL:

If you cannot access that page, then please enable access to in any Internet Security software you may have installed on your computer.