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Continue to ChatCrowdsource request: Using Personal Response Systems to record attendance https://elswedgio.wordpress.com/2011/10/26/crowdsource-request-using-personal-response-systems-to-record-attendance/
Crowdsource request: Using Personal Response Systems to record attendance https://elswedgio.wordpress.com/2011/10/26/crowdsource-request-using-personal-response-systems-to-record-attendance/