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Chemistry, Biology, Physics, and Maths revision

Hey guys, I was really struggling with oxidation numbers and redox reactions for my exam tomorrow and then i stumbled across this...

http://www.youtube.com/user/khanacademy?blend=1&ob=4

This guy makes his videos with tutorials and stuff, I think its absolutely fantastic and he explains things really well. If your worried about anything for any exams! Give it a look, I thought Id share it because its such a fantastic tool of learning!

Good Luck with all exams

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