Clutch Prep is my textbook! For Physic 1 I began the semester and was so lost, but as soon as I dedicated time to watching the videos and doing all of the examples I had a solid understanding of the concepts, and I got an A in the class. I love how the Clutch Prep videos explain every subject in such a simple way. Whenever I do not understand a concept I watch a video and almost immediately understand. I also really liked the live reviews that Johnny does for Organic Chemistry; after watching one of those reviews I knew the concept well enough that i never had to go back and study it! I also ended Organic Chemistry with an A. After how much I enjoyed using Clutch Prep for these subjects, I continue using it for Physics 2 and Organic 2! I always refer Clutch Prep to all of my friends and classmates; everyone should use it!