Visit http://www.hackerhighschool.org to learn more about computer security. It helps to improve security awareness and contains about 12 lessons for school students to learn about computer security and hacking. The lessons are available at this link http://www.hackerhighschool.org/lessons.html.
Good way for beginners to learn test driven programming in Eclipse for Java. See the tutorials here http://eclipsetutorial.sourceforge.net/totalbeginner.html.