This page takes you to any of the pages that feature interactive discussions of various topics or figures in the text. You need the LiveMath plug-in to use them, as discussed on the Plug-ins page. The calendar pages also take you to specific text-extra pages so that you can visit those relevant to a particular day's lecture. Click on the icon in the calendars.
Click here first to test the LiveMath plug-in and learn what it can do once you've installed it. This test and tutorial page includes a link to a page for help if things don't seem to be working. If things seem to be working at first, and then get weird (or simply crash your browser), try increasing the memory allocated to your browser (if that is an option for your operating system), or check that you have the most recent version of the LiveMath plug-in.