If you'd like to get your students' opinions, the Edmodo poll feature is a great choice. In the message box at the top of your wall, simply click on Poll. You're given a text box to write out your question and then space to add as many options as you choose. You can then send the poll to whoever you like.
When the students see the poll, they have the option to vote once and then they are able to see the updated results in a bar graph form. They are also able to comment on the poll, so you can use the poll as a jumping off point for a larger discussion.
