Maybe PE could create a QR code for voting
I don't know if it is possible but maybe PE could generate QR codes for voting. A student or person could scan the picture with their QR reader and that would cast a vote.

Web voting via QR code can currently be accomplished with a QR code generator in conjunction with our various voting links. (see comments)
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I could see using a QR code to link to a Poll or web voting widget. It's worth mentioning this can already be done by using a poll's url in combination with a service like http://qrcode.kaywa.com/
For example:
Direct link to a poll
http://bit.ly/pCfwGx (qrcode)
http://www.polleverywhere.com/multiple_choice_polls/MjcwODY3MDc5Direct link to web voting (notice appended /web)
http://bit.ly/mTPZSH (qrcode)
http://www.polleverywhere.com/multiple_choice_polls/MjcwODY3MDc5/web