Wikimedia
Wikipedia: Ion
This site is an encyclopedia article from the Wikipedia Encyclopedia on Ion. Throughout the site, links are provided for additional information. The information is somewhat in-depth, but also very factual and interesting.
Other
The Finishing Industry: Electroplating How It Works
A comprehensive "how it works" page from the industry that uses it a lot. What it is, how it works, good diagram, and a demonstration that students can do in class (or at home with adult supervision).