Our program required us to buy all the ATI modules too but we paid all at once. It was about $400. Unfortunately, it doesn't include Pharmacology Made Easy and other resources. We just have the ATI module books and some practice tests. I was thinking of buying it here separately Pharmacology Made Easy 2.0I like the interactive aspect of it but it's 90 bucks so I'm hoping to find out if it's worth the price tag. Do you find that reading the ati books are more helpful?