To create a poll for the class you need to go to the tools menu --> Polling and then choose the option to determine the kind of poll you wish to have your class take.
The Default option is a Yes/No Poll, which presents a Green check mark and a red 'X' in the participants' window, that the participants can choose in response to a question that is asked.
The other option is a multiple choice poll, which will present the participants with multiple choice options ranging from a-c,d, or e.
For a multiple choice poll, providing the questions typed on the whiteboard will be much easier than having to repeat the questions.
From here the participants need to simply choose the appropriate response, be it a check mark or a letter.
To clear all the responses all the instructor needs to do is click on the top of the polling column.