You can donate to Knowledge Network online here. You can also donate by phone by calling 1.877.456.6988 (Toll-Free in Canada) or 604.431.3222 (for those in Greater Vancouver). You can also mail in your donation by filling out the form provided here. If you prefer to make a donation using PayPal, you can do that by going to https://www.paypal.com/ca/fundraiser/charity/3442039.
The PayPal Giving Fund Canada will issue your tax receipt and direct your donation to Knowledge Network.