What Are AP Classes? The Ultimate Guide
- Stephen Turban
- 15 hours ago
- 6 min read
AP classes come up constantly once you hit high school, in course registration packets, from your counselor, from other students comparing schedules. But a lot of students sign up for their first AP class without actually knowing what makes it different from a regular one, or what happens with the exam at the end.
This guide covers what an AP class actually is, how many exist, how they are scored, and what you get out of taking one.
Key takeaways
AP, or Advanced Placement, is a College Board program that lets high school students take college-level courses and sit a standardized exam scored from 1 to 5.
There are 42 AP courses and exams currently offered, across arts, English, history and social science, math and computer science, science, and world languages.
A score of 3 or higher is generally considered passing, though how much college credit it earns depends entirely on the specific college.
AP classes matter mainly because they demonstrate course rigor, which NACAC data shows is one of the two factors colleges weigh most heavily in admissions decisions.
What is an AP class?
An AP class is a high school course built to college-level standards and reviewed by college faculty through the College Board's Advanced Placement Program. At the end of the course, you can sit a standardized exam on that subject. Your performance is reported as a single score from 1 to 5, and many colleges use that score to award credit, advanced placement, or both.
The key difference from a regular or honors class is that AP has an external, standardized measure attached to it. According to College Board, AP courses are reviewed and approved by college faculty specifically so that a student taking AP anywhere in the country is being asked to do genuinely college-level work, and the exam gives colleges a consistent way to verify that.
How many AP classes are there?
There are currently 42 AP courses and exams offered by the College Board, spanning seven categories: arts, English, history and social science, math and computer science, science, world languages and cultures, and the two-course AP Capstone program.
No single high school offers all 42. Most schools offer somewhere between 10 and 30, depending on staffing and student demand, and the two newest additions, AP Business with Personal Finance and AP Cybersecurity, are only beginning to roll out. If your school does not offer a subject you want, you can often still register to take the exam independently, though you will need to talk to a counselor about the logistics.
If you want a closer look at strong AP options and where to find them online, our guide to online AP courses worth checking out covers several good starting points by subject.
How are AP classes different from honors classes?
AP and honors classes both aim to be more demanding than a standard course, but only one of them comes with an external, standardized exam. According to College Board, honors classes do not necessarily prepare students for an AP-level exam, and there is no way to earn college credit simply by completing an honors course.
That distinction matters to colleges reviewing your transcript. An A in an AP class carries a verifiable exam attached to it. An A in an honors class reflects your school's own internal standard, which varies far more from school to school.
How is an AP class scored?
Each AP exam is scored on a scale of 1 to 5. A 5 means extremely well qualified, a 4 means well qualified, and a 3 is generally considered qualified, which is the threshold most colleges look for when deciding whether to award credit. Scores of 1 and 2 typically do not earn credit anywhere.
Most AP exams combine multiple-choice questions with free-response questions, essays, or problem sets, though a few, like AP Seminar and AP Art and Design, are scored almost entirely through projects and portfolios rather than a single sit-down test.
Do AP classes count as college credit?
Sometimes, and it depends entirely on the college. According to the NACAC State of College Admission report, grades in college-prep courses and the overall rigor of a student's curriculum are the two factors colleges weigh most heavily in admissions, which is where AP classes do most of their work regardless of whether credit is awarded.
Credit itself varies widely. Large public university systems tend to award credit for a 3 or higher. Many selective private colleges require a 4 or 5, and some, including Dartmouth, Brown, and MIT, award course placement rather than actual credit hours for some or all AP scores. Before assuming an AP class will save you money or time in college, check the specific school's policy using College Board's Credit Policy Search tool.
Why do students take AP classes?
The most common reason is course rigor. Colleges consistently say they want to see students challenge themselves with the toughest courses available at their school, and AP is the most recognizable way to do that. Beyond admissions, AP classes genuinely prepare you for the pace and independence of college coursework, and a strong score can occasionally shorten your time in college or let you skip an introductory course you would rather not repeat.
There is also a research and skills angle that gets less attention. Courses like AP Seminar build research, argumentation, and presentation skills that carry into college regardless of major, in a way that a content-based AP class typically does not.
Going beyond the AP curriculum
AP classes are a strong signal of rigor, but they are not the only one, and for some students they are not even the best one. Courses like AP Seminar and AP Research are the exception here, since they are built entirely around independent research rather than fixed content. If that side of AP interests you more than the content-heavy courses do, working with a mentor on an independent research project is one direct way to build the same skills at a deeper level than a single class period allows.
Programs like the Lumiere Research Scholar Program pair students with a PhD mentor to design and complete a real research project outside the classroom, which can complement or extend what a strong AP course load already signals on your transcript.
Who can take AP classes?
More students than you might expect. College Board's own position is that any academically prepared, motivated student should be able to enroll in AP, not just students at the top of their class. Some AP courses have recommended prerequisites, and some schools add their own requirements, like a placement test, but there is no universal GPA cutoff or gatekeeping requirement across the program.
If you are unsure whether you are ready, talking to your teacher or counselor is the most reliable way to find out, since they know both the specific course and your academic history.
Frequently asked questions
What does AP stand for?
AP stands for Advanced Placement, a program run by the College Board that offers standardized college-level courses and exams to high school students.
Are AP classes free?
The classes themselves are typically included in your school's regular course offerings at no extra cost. The exams are not free, though College Board offers fee reductions for eligible students, and many schools or districts cover part of the cost.
Can homeschoolers take AP exams?
Yes, homeschooled students can register to take AP exams even without taking a formal AP class, though they need to find a school in their area willing to administer the exam and should check in early, since registration deadlines are typically set months in advance.
What happens if I fail an AP exam?
Nothing happens to your class grade. The AP exam score is separate from your course grade, and a low AP score, generally a 1 or 2, simply will not earn you college credit. You can also choose not to send that score to any college.
Is AP harder than IB?
They are difficult in different ways rather than one being uniformly harder. AP lets you choose individual courses subject by subject, while IB's Diploma Programme requires a broader, more rigid set of courses taken together over two years. Many students find IB more demanding as a full program, while AP offers more flexibility to specialize in fewer subjects.
Resources
Official AP resources
AP Courses and Exams, the full, current list of all 42 AP subjects by category.
Choosing Your AP Courses, College Board's own guidance on how to pick a course load.
AP Credit Policy Search, look up how a specific college treats AP scores.
NACAC Factors in the Admission Decision, the data behind how much curriculum rigor actually matters.
More from the Lumiere blog
Stephen is one of the founders of Lumiere and a Harvard College graduate. He founded Lumiere as a Ph.D. student at Harvard Business School. Lumiere is a selective research program in which students work one-on-one with a mentor to develop an independent research paper.