IT requirements for tutorials


  • We recommend at least a 15 MBit/sec Internet connection for your school.
  • The smallest screen size we support is 1024 x 728 px.
  • You will need a desktop or laptop computer with a mouse (or touchpad) and keyboard for our middle and high school-level courses, CS Discoveries and CS Principles. iPads (including with a keyboard attachment) or other tablets are not supported for CS Discoveries or CS Principles.
  • All other content, such as K-5 courses (Computer Science Fundamentals) and Hour of Code activities are compatible on iPads and Chromebooks, in addition to all other modern laptop or desktop computers.

Supported Browsers and Platforms takes a tiered approach to the level of support we provide for different browsers and platforms to ensure we are building a stellar experience for most of our users, and an acceptable experience for the rest. We support the following combinations of operating systems and browsers:

Browser Operating System
Chrome 33.x and higher Windows 7 and higher

macOS 10.6 and higher

Android 4.1.2 and higher

ChromeOS (Chromebooks)
Safari 7.0.x and higher macOS 10.6 and higher

iOS 7.x and higher
Internet Explorer 11 and higher Windows 7 and higher

macOS 10.6 and higher
Microsoft Edge Windows 10 and higher
Firefox 25.x and higher Windows 7 and higher

Note that all CS Principles and CS Discoveries courses are not compatible with tablets or mobile devices - a full keyboard and mouse (or touchpad, like on Macbooks) are required. Chromebooks are compatible. iPads or other tablets with a keyboard attachment are not compatible.

Sites to Unblock

For the very best experience with all content, we recommend consulting with your school or district's IT department to ensure the following sites are allowed and aren't blocked.

Priority URL
To use YouTube hosted videos
(Enhanced Privacy Mode - available late July 2018)*
To use YouTube hosted videos
(Deprecated late July 2018)**
To use hosted videos Unblock:
To use Internet Simulator
To use Web Lab


We use YouTube to embed videos into and our online learning platform. For schools with YouTube blocked, we attempt to display a hosted video player instead.

Can you play this video?

Before you start's online courses, test playback for the video below to make sure you're good to go.

This is the player used throughout the curriculum. It will try to show the video through YouTube and, if YouTube is blocked, show the hosted video using our "fallback" player instead.

Video not playing?

If video does not work, you can email us at

However, you can still use our tutorials without video.

  1. We've made all our videos available for download together. If your school has low bandwidth, we recommend that you download videos and show them to students on a shared screen.
  2. Integrated into our tutorials, we've added a green download link icon for each video, allowing students to download individual tutorial videos.
  3. If all fails, there is a "Show Notes" tab that provides a storyboard equivalent of videos.

Special settings for Google Apps/G-Suite users

If you're a G-suite administrator, be sure to check what your restriction settings are for YouTube. If you have specified the "Strict Restricted YouTube Access" setting or if you see messages stating 'this video has been restricted', you can add our channel to the approved list of channels. See this guide from Google to learn about how to add our channel to the approved list. You can also see this guide to learn more about different settings and which is best for your classroom.

Still having trouble?

We'll help you out - just email us at!