For the best learning experience we recommend the following:


Supported Modern Browsers
  • Internet Explorer 11+
  • Firefox 30+
  • Chrome 40+
  • Safari 7+
  • All modern browsers, devices, and operating systems generally work, but may not supported.

Internet Connections

  • A broadband connection is required.
  • Dialup connections may cause problems.
  • Poor or slow wireless connections, 3G connections, or satellite connections may cause problems.
  • ADSL connections with slow upload speeds may cause problems.

Security and Viruses on User PCs
  • Security packages that dynamically inject JavaScript into pages as an anti-popup measure will interfere with our website, and is not supported. This specifically includes some versions of Norton/Symantec.
  • Viruses on infected PCs may cause problems and are not our responsibility.
Test Result Requirement You Required for...
Fail Windows 7+, MAC OS X 10.8+, iOS 9+, Android 6+ Unknown ...viewing the website correctly.
Fail MSIE 11+, Firefox 30+,
Safari 7+, Chrome 40+
Unknown ...viewing the website correctly.
Enabled ...interacting with the website.
Enabled ...remaining signed in.
Enabled ...saving quiz answers.
Return to the Home Page or Run This Test Again
User Info
54.224.164.166
CCBot/2.0 (http://commoncrawl.org/faq/)