<p>Hi.
I'm considering to take some online courses that are at level of college studies.
I've gone through AP Physics/ Chemistry/ Biology,
so, I'd like to get some courses after that.</p>
<p>I've considered
Stanford EPGY
Coursera
and edX</p>
<p>but, EPGY seems too costy..
I'm not sure if I can get official acknowledgement from courses that are given in coursera or edX.</p>
<p>Thanks for your help in advance.</p>