Padlet is undoubtedly one of my all time favorite sites for student collaboration and brainstorming. Padlet is an online bulletin board that allows teachers & students to post images, videos, documents, and text. All this can be done using the sites intuitive drag & drop interface. Padlet's best feature would have to be it's user friendliness. A teacher can literally set a wall up on the fly and have students posting to the wall in under a minute. You just need to go to www.padlet.com, click on the build a wall button, and share the link with your class. Done.
Here is a sample wall that Mrs. Kolar created to display the Fox Elementary Student Monsters -
How to set up a Wall
The Tool Icons on the Right side allows owners to access sharing options, account information, or make modifications to the current wall.