This document provides instructions for using Voicethread, a multimedia presentation tool that allows teachers and students to collaboratively comment on presentations using audio, video, photos, and text. Key features of Voicethread include the ability to upload various media types to create a presentation, share the presentation via a URL, and have students engage in discussion by leaving audio or written comments. The document outlines the steps for registering for a free Voicethread account, creating and uploading content to a presentation, sharing the presentation, and having students collaborate through commenting.