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2025-26 AP Computer Science A - What's Changing?
Knowledge Base Article
1. New Units Structure: The updated AP Computer Science A curriculum condenses the previous multi-unit framework into four streamlined units:
- Unit 1 (15%–25% of exam score): Using Objects and Methods: You'll learn the fundamentals of Java, a programming language, and other foundational concepts for coding. You'll explore reference data as a way to represent real-world objects in a digital world and discover methods to perform more complex operations.
- Unit 2 (25%–35% of exam score): Selection and Iteration: You'll delve into the building blocks of algorithms and focus on using conditional statements to solve problems and control results. You'll learn about iteration, another building block of algorithms that are for repetition.
- Unit 3 (10%–18% of exam score): Class Creation: You'll explore how real-world interactions can be expressed digitally by organizing behaviors and attributes into classes.
- Unit 4 (30%–40% of exam score): Data Collections: You'll learn techniques and standard algorithms to work with collections of related data, known as data structures. You'll delve deeper into data sets, exploring array, ArrayList of objects, and 2D arrays
2. Curriculum Changes (New Topics and Topics Removed)
- New Addition: The most notable addition is text file I/O and dataset manipulation as required content, reflecting the importance of data-driven programming tasks in both college courses and industry. Students are now expected to work with files, parse data, and perform operations on collections drawn from datasets.
- What's removed: The standalone inheritance unit and its associated concepts, including polymorphism, have been dropped from required content. While teachers may still introduce these topics for enrichment, they are no longer explicitly tested on the AP exam. The course’s emphasis now prioritizes foundational object-oriented programming (without inheritance hierarchies), algorithmic problem-solving, modular design, and real-world data processing skills.
3. Exam Format & Weighting Changes
I. Multiple-choice | 42 Questions (up from 40) | 55% of Exam Score (previously 50%)
- Multiple-choice questions are distributed according to the new four-unit structure, with greater proportional emphasis on Data Collections.
II. Free-response | 4 Questions | 45% of Exam Score
- Question 1: Methods and Control Structures
- Question 2: Classes
- Question 3: Data Analysis with ArrayList
- Question 4: 2D Array
4. Why the Revision: The College Board’s revision aligns AP CSA more closely with the current expectations of first-semester college programming courses and industry-relevant skills. By removing low-frequency college topics like explicit inheritance and elevating real-world tasks such as dataset processing, the course better prepares students for both further study in computer science and practical programming challenges. The new unit structure is also designed to simplify teaching, reduce fragmentation, and allow more time for mastery of core skills rather than rushing through a larger number of smaller, loosely connected units.