There are companies dedicated to online MCAT Prep and some companies which are mostly classroom based: Kaplan and Princeton Review .
There is an MCAT Store which sells the most popular MCAT materials such as The Gold Standard MCAT, Kaplan, Princeton Review and Examkrackers Audio Osmosis.
The MCAT will not only test your scientific knowledge in biology, physics, general chemistry and organic chemistry, but will also measure your problem-solving, critical thinking and writing skills. The MCAT is divided into four sections: Physical Sciences, Verbal Reasoning, the Writing Sample and Biological Sciences.
The Physical Sciences section contains MCAT physics and MCAT general chemistry. The Biological Sciences section contains MCAT biology and MCAT organic chemistry. All questions, save the MCAT Writing Sample, are multiple choice with four choices per question.