Find out more about the legendary Robin Hood:
BoldOutlaw.com
BenTurner.com/RobinHood

Hong Kil Dong was the subject of the first animation movie made in Korea: KoreanFilm.org

The town of Jang Seong in Korea claims to be the hometown of Hong Kil Dong and holds a festival in his honor every year: JangSeong.JeonNam.kr

You'll find lists of other great graphic novels for young readers at these sites:
NoFlyingNoTights.com
Booklist

Many different maps of Korea can be printed off this page: www.lib.UTexas.edu

See thousands of beautiful photos of Korea: LifeInKorea

Find out about the land, climate, people and culture of Korea: Life in Korea: General Information

This page shows the different parts of traditional Korean clothing and some royal costumes: Korean Traditional Clothing

For older students and teachers, this page has in-depth information about the early Chosun Dynasty: Asianinfo.org

Here's an introduction to the martial art: Barrel.net

Traditional paintings of mountain spirits: SanShin: The Mountain Spirit

and a screen of the the Ship Jang Pyung: Ten Symbols of Longevity

These introductions to Hangul have boxes you can click on to hear the sound of a letter or syllable:
Indiana.edu
LangIntro.com

This website includes pages you can print to practice each letter: LifeInKorea.com