Padlet is a free virtual wall where you can pose questions or ideas for students to answer or think about. Using a unique URL, students can then respond using a virtual sticky note on the wall. A URL to an image, video, slideshow, or document can also be added to the sticky. Students do not need a login to add a note to your wall. While you don't need a login to create a wall, I would suggest that teachers sign up for a free account. With an account, you can password protect a wall and moderate it (approve any posted stickies). Click out the video below to see how to set up a wall for your students.