A database provided by NC Live. LearningExpress offers the practice tests, exercises, skill-building courses, eBooks, and information you need to achieve the results you want—at school, at work,
"The Career and Professional Development Center provides a comprehensive range of services, programs and materials focused on career exploration, decision making, skill development and experiential learning to empower students"
About.com is a for-profit site with advertisements and sponsored links, so you need to consider the information here in light of other sources. That said, they often have very useful information, written by people who have interest and experience in the area they are covering.