Polls are often used as ways to get a visual representation of students’ engagement in Teams.
To start a poll, navigate to the channel you would like to take a poll in, and open the chat box to start a new message. at the bottom of the text box, click the Forms icon. If you do not see this, click the ellipsis (…) to see more options. Once you select Forms, enter a title, question, and choices, and click next.
For more information see Microsoft Team Help.