You need to register (free) and download a recorder to your computer (Windows).
You are then able to use the recorder to record your PowerPoint presentation. It records your animations, transitions, as well as embedded video and audio. The presenter is also able to annotate their slides which will also be part of the recording. Once you have completed this you can then upload the file ready to share it with your students or other viewers.
This video can be embedded into your online class e.g. Blackboard or Moodle or into a blog or wiki. How great for the teacher to use this as a presentation after a class so that students can go to it to reinforce their learning or the teacher could use it as an introduction to a new topic.
Students could use this tool to present their findings about a research topic. This can be shared with a wider audience on a classroom blog.