This is often the centerpiece of the 4A curriculum. Students move beyond linear equations into the world of parabolas.

Building on earlier years, 4A introduces more complex quadratic optimization problems, teaching students how to find maximum and minimum values—a skill directly applicable to engineering and data science.

While Book 4B focuses on topics like Polynomials, Exponential Functions, and Trigonometry (part 2), Book 4A lays the absolute foundation for the entire HKDSE examination. Without mastering 4A, a student will struggle with every subsequent math topic.

Oxford Mathematics for the New Century 4A also provides support for teachers. Some of the ways the textbook supports teachers include:

While the physical textbook and its accompanying Solution Guide are sold by major educational retailers (like Swindon Book in Hong Kong or online via Oxford University Press e-store), there are supplementary resources:

Detailed step-by-step guides for textbook exercises.