How To Use This Site

Navigation
To navigate through the main sections of this site, click on the headings at the top and bottom of every page. Every main heading has a number of subsections. When you click on a main heading, links to the subsections appear on the left. On the right side of every page are two boxes: "External Links" contains links to other web sites with related content; "Internal Links" link you to interactive activites within this site.

Glossary
Definitions for highlighted words in the articles can be found by rolling your mouse over the word. Clicking on the word will take you to its definition in the glossary.