Any good websites/Youtube Channels for A-Levels?

I plan on taking Biology, Chemistry, Physics and Philosophy & Ethics for A-Levels.

I was just wondering if you guys knew any really informative websites/Youtube channels that would aid me before and during the course of these two upcoming years with revision and learning material.

Thanks,
^_^'

P.S. I'm new to TSR so forgive me if I'm posting this in the incorrect place.

I found that CrashCourse Biology on Youtube had a lot of the information taught in A level Biology, even though it's American. I also got a lot of use out of this website: http://www.physicsandmathstutor.com/ for Physics. The Royal Society of Chemistry website is a brilliant resource for Chemistry: http://www.rsc.org/

Wireless Philosophy is pretty good.

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good revision site https://goo.gl/pxt4dm

I plan on taking Biology, Chemistry, Physics and Philosophy & Ethics for A-Levels.

I was just wondering if you guys knew any really informative websites/Youtube channels that would aid me before and during the course of these two upcoming years with revision and learning material.

Thanks,
^_^'

P.S. I'm new to TSR so forgive me if I'm posting this in the incorrect place.

I plan on taking Biology, Chemistry, Physics and Philosophy & Ethics for A-Levels.

I was just wondering if you guys knew any really informative websites/Youtube channels that would aid me before and during the course of these two upcoming years with revision and learning material.

Thanks,
^_^'

P.S. I'm new to TSR so forgive me if I'm posting this in the incorrect place.