High School Mathematics Extensions

This online textbook is intended for, but not limited to, high school students without a rigorous understanding and knowledge of university-level mathematics. Therefore, the text's language reflects the expected mathematical maturity of the intended audience. This book introduces several interesting topics not covered in the standard high school curriculum of most countries. The materials presented can be challenging, but at the same time, we strive to make this book readable to all who are a few years from applying to higher education.