Seconded

One of my med-school classmates conceptualized these types of tests as such: it's like playing Madden on PlayStation. You might be a good football player. You might be really good at Mario Brothers. You might be Belichek. Hopefully, you have proficiency at a whole bag of skills. But the only way to be an expert at Madden is to sit down and play it.

That dude did a metric shitton of questions. Get access to questions and real practice tests. The classroom work is nice, but it the kid can hack it in med-school, he won't need MCAT concepts spoon-fed to him. He will, in all likelihood, need to get in reps.