http://www.bls.gov/k12/ Bureau of Labor and Statistics Occupational Outlook Handbook. "For hundreds of different types of jobs, the Occupational Outlook Handbook tells you: the training and education needed, earnings, expected job prospects, what workers do on the job, (and) working conditions.
http://www.acinet.org/ "CareerOneStop is sponsored by the U. S. Department of Labor, Employment and Training Administration. Explore careers, salary and benefits, education and training, job search, resumes and interviews, people and places to help."
http://www.thecareerproject.org/Home "The careerproject.org is an interactive career profile database that allows you a personal and uncensored look into thousands of real careers and jobs through the eyes of the people who work them."
American Medical Association. "Careers in Health Care - lists information about more than 80 careers in health care and 8,600 accredited educational programs."