From the site:
This Overview of the Vietnamese Web pages is intended to give you some idea of its contents so that you know how to find what you need or what might interest you - a kind of navigation guide. The core of this site is a series of 20 Lessons for teaching you Spoken Vietnamese. A Guide To Pronunciation is an interactive resource that lets you hear all of the sounds of the language: consonants, vowels, and tones. If you want to learn just enough language for travel, you can click on Quick Vietnamese for Tourists. If you need information on travel or currency, follow those links;and much more.