We have replaced the old course engine with a new and improved one!  Simultaneously we have updated all of our courses.  For most it is simply a change of format, but in the General Chemistry course videos have been added on a number of topics, and the General Physics course has been almost completely overhauled.  Unfortunately using the new course engine will require creating a new user account and my apologies for that.  I waited until the end of the semester to cause as little disruption to your studies as possible and the old courses will still be available for a limited time through the ‘Old Courses’ link in the navigation toolbar at the top of the page.  I hope you enjoy the new course engine and, as always, Happy Studying!

Premium courses are available for purchase at www.chemistryprep.com! Courses include updated/expanded outlines, hundreds of quiz questions, and variable speed playback.