Stanford is offering free online courses in Introduction to Databases, Machine Learning and Introduction to AI.
http://www.db-class.orghttp://www.ml-class.org/http://www.ai-class.org/Anyone can sign up and take the course.
There will be at least 6 hours per week of studying, along with weekly graded homework assignments and midterm and final exams. The instructors, who will be available to answer questions, will issue a certificate for those who complete the course, along with a final grade.
Online enrolment is still open but be quick because the first assignments are due by the end of next week.
Course schedule - Introduction to Databases