***HOW TO READ THIS SITE***: all text, including links (usually), *is* part of the content to read, and after that, you click for more details: outlined.

• IN OTHER WORDS, read the whole page. It usually *is* the summary (content), and a menu. If you want more info on any part of it, click for details.
• (Suggestions and comments are appreciated. See the page footer for how to send them.)
• DETAILS:
• Each page is like a document (not always just a menu). If pages are paragraphs, you can see each sentence as a "topic sentence" for the linked page.
• Sometimes people say "TL;DR": they want a summary to *skim*, and then get more info if/when they want it. This tries to be just that: summary AND outline.
• There is no single overall hierarchy for this content. Some entries can appear in many different pages: wherever they make sense and seem helpful.
• Let me know if it would be easier to read this site, or parts of it, if some pages were collapsed into single documents--to avoid click,click,back,back.
• (Content notes: multiple languages, hopefully skimmable, links to other free materials.)
• (Suggestions/questions welcome! More information is planned or available on request. Page footer has contact info.)