Use the Canvas Discussions tool to create, facilitate, and contribute to online discussions involving your entire class or smaller groups. A tool-level setting allows you to determine whether students can create new topics, delete their own posts, or attach files to discussion posts. Discussion topics in Canvas can be either graded or ungraded, and the format can be focused or threaded. Focused discussions allow for two levels of nesting, the original post and subsequent replies, and are best suited to short-lived discussions. The threaded format, which is designed for more extended interactions, supports replies within replies with unlimited nesting.