I need some tips for Calculus/Chem/Phys

<p>Sorry if this is the wrong place to ask. I need an online source that can really help on these subjects. In my college my professor is a horrible lecturer (if that is a word) so I get stuck on areas I don't understand often. I rarely raise my hand, since people often get annoyed by those who constantly raises their hand every few minutes which interrupts with the lecture.</p>

<p>I also try to utilize my school's tutoring center, although I hate the tutors, for legitimate reasons which I cannot explain if I don't turn it into a rant.</p>

<p>As for the book, well you can't learn 100% from the book.</p>

<p>Sorry I'm not trying to make a bunch of excuses I'm just ruling out my reason for not doing well in that math class.
Any help would be appreciate, thanks!</p>