The English accent of the tutor (who teaches many subjects) in these video tutorials is very good and I hope you learn from this link, as well as benefit yourself in your studies or just for personal interest or general knowledge.
The following is being taught/has been discussed on this link:
Arithmetic
Banking and Money
Biology
Calculus
Chemistry
Credit Crisis
Current Economics
Developmental Math
Geometry
History
Physics
Pre-algebra
Statistics
Trigonometry
Links:
http://www.khanacademy.org/
http://www.youtube.com/user/khanacademy