If you are having problems in navigating this site, you should try the following. You can hold down your left mouse button with the pointer over the up or down arrows and the window will scroll up or down. Alternatively, you can hold down your left mouse button while your pointer is over the up-down slider control which will appear to pull the page up or down. All pages in this tutorial have hyperlinks for navigation, at frequent intervals. I have tried to ensure that there are no very long passages of text without navigation aids.
All pages have tables at the top and bottom of the page which contain hyperlinks.
These will link to parts of the page which correspond to major structural divisions, and to other pages on my site. I have sometimes used hyperlinks to other pages or sites on the World Wide Web, although mostly these appear on pages where you would expect to find them - such as pages of links to useful sites or resources on the Web. All pages of the tutorial allow you to follow my lead, by using next or previous and most have a link to the top of the page. However, I hope users of the tutorials will feel free to work autonomously, in accordance with your own preferred methods of study. Teachers could use the tutorials very formally to direct students who work best in this way.