I have added some new links for you my fellow friends.
I don't know if it can help you in any way but do check it out.
And it got something to do with studies!hehe
For chemistry,check out the simplechemconcepts website.
You can ask your doubted questions on the website.
I got into contact with him and he always send me emails regarding useful and important notes of a topic.
It's a great website and the guy named Sean is a very frinedly and helpful person.
He has even posted some videos on youtube.So go and check it out!
Ok,cya=D

peace out~~