We invite you to learn as much as possible from the following sites:
MIT OPEN COURSEWARE  ( Massachusetts Institute of Technology, Cambridge MA USA)
Coursera ( Nearly 200courses available over a wide range of subjects.) 
edX ( MIT and Harvard, will offer certificate to people who complete the work)
Udacity    ( Focused on computer science courses from beginner to advanced)
Open Learning Initiative ( Based in the UK, offers hundreds of free online courses in a range of fields)
The Open University
Paul's Online Math Notes
Amrita's Virtual Laboratories