All of the materials for the course are available via the tabs at the top of this page. There are links to course lessons, the course textbook, a dictionary of key concepts, and links to useful tools.

• The Home tab is a link to this page and is available on every page with a command bar at the top. Useful in case you want to review how to navigate and utilize the site.

• The Lessons page is your home base for the course. Everything you need to read or do is listed on this page - interactive lessons, interactive exercises, extras, tools, and logic puzzles.

  The links on the Lessons page are grouped into various categories - a preface, fifteen numbered lessons, and a postface. You can navigate through these categories using the arrow keys or by clicking the corresponding items in the navigation bar at the bottom of the page. If you want to see all of the lessons at once, press the Escape key. This allows you to see all of the content of the course on one page. To switch back to seeing one lesson at a time, press the Escape key a second time.

  The links in each of the numbered lessons are annotated with checkboxes. Once you have mastered each item, click the associated checkbox to remind yourself that you have finished that item. Note that this information is stored on your computer. If you switch to a different computer, use a different browser, or delete the web data in your browser, this information will be lost. (In versions of the course with Intrologic accounts, this information is saved on the server and is not lost in such situations.)

Each lesson in the course consists of multiple "panes". As with the Lessons page, you can navigate through these panes using the arrow keys or by clicking the corresponding items in the navigation bar at the bottom of the page. Pressing the up arrow key will take you to the relevant pane of the Lessons page. The escape key works here as well. If you want to see all of the panes at once, press the Escape key. To switch back to seeing one pane at a time, press the Escape key a second time.

• The Chapters page provides links to the course material organized as traditional textbook chapters. The content of these chapters is identical to that in the lessons. It is optional and is provided solely for the convenience of those who prefer traditional textbook format to the hypercard format used on the Lessons page.

• The Dictionary page provides links to pages describing the key concepts of the course. In addition to pithy definitions, there are links to the relevant portions of the text and associated exercises.

• The Tools tab provides access to useful tools, e.g. truth table generators, programs to transform expressions into equivalent expressions, and a variety of proof editors. The tools are your friends. Use them!

When you are ready, click on the Lessons tab above to get started.