To prepare for the F=ma exam, high school students are advised to focus on specific chapters from Morin's "Introduction to Classical Mechanics," although some participants suggest that this book may be too advanced due to its heavy reliance on calculus and concepts like Lagrangian mechanics. Instead, "Problems and Solutions in Introductory Mechanics" by Morin is recommended as a more suitable resource for high school students. The discussion highlights the importance of selecting appropriate materials that align with the exam's requirements and the student's current understanding of physics and calculus. Additionally, the Feynman Lectures and Halliday Resnick textbooks are mentioned as supplementary resources, but the emphasis remains on finding the right balance of complexity in study materials.