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Khan Academy,. (2015). Khan Academy. Retrieved 25 October 2015, from http://khanacademy.org

Mentimeter.com,. (2015). Mentimeter - Turn opinions into tangible data, in real-time. Retrieved 25 October 2015, from http://mentimeter.com

 

Google.ca,. (2015). Google. Retrieved 25 October 2015, from http://google.ca