Self-teaching chemistry, physics, and math for high school olympiads requires careful selection of resources. Recommended materials include Atkins Chemistry for foundational chemistry concepts, though it may not cover all necessary topics like physical chemistry. For organic chemistry, Carey's Organic Chemistry is suggested, especially due to its solutions manual. Zumdahl's chemistry book is also noted as a solid resource. In physics, Halliday and Resnick are commonly used, with some users mentioning access to the instructor's solution manual for deeper understanding. Many students preparing for these olympiads utilize resources from the Art of Problem Solving community, indicating a collaborative approach to studying. Balancing preparation for all three subjects is considered ambitious but achievable with the right dedication and resources.