How to Practice AP Free-Response Questions

Start with a question you can score

Choose a skill you remember stumbling over in class. Maybe you could read a graph but struggled to explain how its data supported your prediction. A question that asks you to make that connection gives you a reason to write, check, and try again. Pick a topic your class has covered so you can concentrate on how you express the reasoning.

Find your subject in the AP Central question archive. Open the released question and set aside its matching scoring guidelines. Check the year, question label, and set where a set is listed. If your course has changed since the question appeared, ask your teacher which parts fit the current exam. Your course and exam description can help you match an older task to the skills you are studying now.

Write something a reader can actually mark

Read the full prompt, then mark the verbs that tell you what to produce. “Describe” might call for a pattern in the data. “Explain” directs you to show how or why something happens. Read the rest of the sentence too. The phrase after the verb tells you which comparison, event, source, or relationship belongs in your answer.

Imagine a biology prompt describes traps baited with a sugar solution and identical traps holding plain water. The supplied counts show that the baited traps caught more flies. If the prompt asks for a comparison, name which group caught more. If it asks why the plain-water traps belong in the design, explain that they show how many flies the trap catches when the sugar is absent. A reader can now see how that comparison helps you separate the effect of the sugar from the effect of the trap itself.

Leave your first attempt intact. Make a copy for revision, or leave space beside your handwritten answer. When you score the response, the original lets you distinguish an idea you put on the page from an idea that occurred to you while reading the guidelines.

Match your words to the scoring guidelines

Take each relevant criterion in the scoring rubric and underline the exact words you think satisfy it. For a history essay, that might be a sentence explaining how a document supports your argument. For a biology response, it might be a comparison that names both experimental conditions. Read any qualifications in the guidelines for that particular question before deciding that your words qualify.

Use three plain labels in the margin. “Present” means you can point to the relevant words in your answer. “Missing” means you can identify a requirement the response skipped. “Ask” means you found a borderline case. Beside an “Ask” label, write the exact question you want your teacher to settle, such as “Does this sentence explain the cause, or does it restate the trend?” That gives your teacher a manageable piece of work to discuss with you.

Now open a scored student sample if one is available. Predict how the same criterion applies to the sample, then read the commentary. You may find that a shorter response makes the connection explicit while a longer one leaves the reader to infer it. Look for the phrase that changes the scoring decision. Save the underlying lesson in your own words.

Sample plan

• Monday, 20 minutes. Choose a released biology prompt involving experimental results. Write an answer with the guidelines closed. Circle the word or phrase that names the comparison you made.
• Tuesday, 15 minutes. Score the original. Pair each disputed criterion with a line of your response and rewrite the explanation that needs the most work.
• Wednesday, 10 minutes. Read a scored response to the same question. Compare the reader’s explanation with yours and take a specific disagreement to your teacher.
• Thursday, 15 minutes. Pick a new prompt about a different experiment. Highlight the conditions being compared, then write the comparison and explanation from scratch.
• Friday, 10 minutes. Check the fresh response. File the original and the new attempt together so you can see whether the same gap appears in both.
• Saturday, 15 minutes. Look at another released experiment. Say which variable changed, which outcome was measured, and what the data let you conclude.
• Sunday, 5 minutes. Pick the next question and tuck the guidelines behind it. Circle the verb that tells you what your answer should do.

Choose the next prompt from what you wrote

If you labeled the axes correctly but reversed the comparison in prose, choose another graph and practice saying which condition changed and in which direction. If you made the comparison clearly but struggled to explain it, review the relevant concept before you write another answer. Your teacher can also assign course practice in AP Classroom through College Board. Bring the marked response when you ask for another prompt. It shows your teacher which part of the task you are ready to tackle.