This document provides an overview of the collaborative tool Wallwisher. It defines Wallwisher as an internet application that allows students to post electronic sticky notes on a shared digital wall to have collaborative conversations or brainstorm ideas. The benefits mentioned are that it allows students to participate interactively by incorporating text, audio and visual materials, and to assess and summarize their understanding in a limited number of characters. Instructions are provided on how to get started with Wallwisher by creating a wall and posting notes without any signup needed.