How do I set up a lockdown browser?

Assessment Companion is a Chrome extension that prevents students from viewing other tabs or windows while taking content assessments.

Students request and teachers approve content assessments as usual. When a student clicks “Start Assessment”, the locked experience will begin. If the student closes the window before completing the assessment, they will need to request the assessment again.

If students use the Read Aloud extension for content assessments, make sure that students have the extension is open before requesting the assessment. 

To enable the lockdown browser at your school:

  1. Install the Assessment Companion Chrome Extension on student computers. You can either have an IT admin install the extension, or have students install it themselves.
  2. Have your school leader or site admin email with the following information:
    • Explain that you want to turn on the lockdown browser for your school.
    • Specify the exact date when you want to enable the lockdown browser. The Chrome extension must be installed on all student computers before we can enable the feature.
  3. A member of the Summit Learning support team will enable the feature for you. 
  4. To turn off lockdown browser for specific students, please write a ticket into the help desk.

Important Note

After the support team enables the lockdown browser on, the Chrome extension must be installed on student computers in order for students to start content assessments. If a student starts an assessment in a non-Chrome browser or in Chrome but without the extension installed, they will get an error message asking them to install the browser extension.


Communicating the Lockdown Browser to your school community

Lockdown Browser Limitations

Calculators:  Teachers can indicate whether or not they want to allow their student to use the calculator during assessments for a particular focus area (even with lockdown browser enabled).  You can learn more about calculators here. 

Accessibility Shortcuts: Since we make the assessment full-screen, here are some keyboard shortcuts that can be used:

  • Ctrl + Shift and +  | Increase screen scale, making items appear larger on your screen.
  • Ctrl + Shift and –  | Decrease screen scale, making items appear smaller on your screen.
  • Ctrl + Shift and )  | Reset screen scale to the default setting.
  • Ctrl + ALT and Z  | Turn on spoken feedback

For Google admins

These are the fields you can enter in the Google Admin console to mass install the Lockdown Browser extension for your school:

ID: lojeahlfbkkiopgolmojagpemoflmkhn
For additional information for using Chrome extensions, find Google's support article here.


Was this article helpful?
79 out of 150 found this helpful
Have more questions? Submit a request.


  • all you gotta do is just go to chrome store and add this.

  • When I click the link above it gives me an Error 404 and I can't find the extension for students to install.

Please sign in to leave a comment.