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System Requirements

Minimum Requirements:

  • Windows XP or newer
  • Internet Explorer 8+, Chrome, or Firefox 5+
  • Headphones or speakers
  • Flash 10.3+
  • JavaScript Enabled
  • High-speed broadband internet connection
    (512 Kbps download speed)


  • Chrome 30+, Firefox 20+ , Internet Explorer 10+
  • Adobe Flash 12+
  • Javascript and cookies enabled
  • Popup blocker disabled
  • 1280 x 1024 resolution
  • 2GB RAM
  • Dual core CPU
  • Wired internet (not wireless) broadband connection capable of 1.5Mbps+

Frequently Asked Questions

Video Broadcast

I don‘t see the video, or I see a blank box instead of the video.

  1. Ensure that the Adobe Flash plugin is installed
    2. Troubleshoot Flash here:
  2. Clear your browser‘s cache and cookies, then restart your browser and join the broadcast again
  3. If using Internet Explorer
    1. turn off Compatibility View Settings
    2. enable multimedia settings
  4. Clear Flash cookies and settings

The video won‘t load or play.

Your computer‘s or organization‘s firewall may be blocking the transmission. Please ensure that the following ports are enabled: 80, 443, 1935, 843. Instructions on how to enable ports on your local firewall for various operating systems can be found here:

My video is jittery or choppy, or there is lag in the transmission.

If the video broadcast is jittery or choppy, or if there are delays in the transmission, there could be several causes:
  1. Poor internet connection
    1. Please ensure that your ISP provides you with at least 1Mbps download speeds.
    2. If you are on a WiFi connection, try directly connecting to the Internet with an Ethernet cable.
  2. Your computer may not have sufficient CPU resources because it is burdened with other processes or programs that are slowing it down. Please try closing all other programs besides your Internet browser. In some cases, you may need to reboot your computer to reset a hung process.
  3. Flash may be attempting to use hardware acceleration to display the video, but your video card is not compatible. To disable hardware acceleration:
    1. Right click on the video and select Settings...
    2. Click the far left 'Display' tab and uncheck Enable Hardware Acceleration
    3. Close the Flash Player settings box
    4. Refresh the page

TeachCast Media or Presentation Viewing

I can‘t see the presentation file (top right) that the teacher is referring to.

  • Please ensure that JavaScript is enabled in your browser. You may also need to clear your browser‘s cache, then restart the browser and re-enter the TeachCast broadcast.

How do I find out more?