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You can then follow the steps listed in the TurningPoint guidance to create polling questions (please ignore any references to signing in to a TurningPoint account) : https://wwwd2p83s3q5aa83e.turningtechnologies.com/pdf/userguides/tp8cloudfront.net/wp-content/uploads/2018/03/PowerPointPollingPC.PDF pdf
The guidance above from TurningPoint also includes instructions on how to poll during your session, save session data, and how to generate reports afterwards.