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The most challenging of all this year’s AP Chemistry FRQs was Q6, the Zn and AI Galvanic Cell question, which identified the most advanced students in the course, generally helping to identify which would receive AP 4s and which would receive AP 5s. 5% of students earned all 4 points on it.

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The highest performance on this year’s free-response questions was on Q4, the Methanol and Formaldehyde question. 22% of students earned all 4 points on it.

Reposted by Amy Roediger

...students who can answer all but one part of the question are generally receiving an AP 4; and students who can answer 1-2 parts of the question are generally receiving AP 3s. Students unable to answer any part of this question correctly are typically receiving AP 1s and 2s.

Reposted by Amy Roediger

...so that the measurement value of the question is high, working well to differentiate between students who should receive 5s, 4s, and 3s. Students who can answer every part of this question are typically receiving an AP 5 for their overall work on the exam...

Reposted by Amy Roediger

Free-Response Questions (FRQs) spr.ly/60164TpAM Question 7, the Glycolate question, is psychometrically pristine, the most statistically “perfect” question I’ve yet seen on this year’s exams, which means that each of the 4 points is significantly different in difficulty from every other point...

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...so there are certainly exceptions to the positive trend in performance over time, but it’s good to see that in aggregate, performance is improving alongside increased opportunities.

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I hear and share concerns of school administrators rushing AP Chemistry teachers by cutting labs or not providing adequate instructional time...

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...overtaking AP Economics to be the subject that has provided the most additional students with access to the learning environments of their classrooms.

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Another rave for the AP Chemistry community: they have pulled off this year’s significant increase in student performance while also expanding this very challenging course to 18,000 more students...

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So this is a good unit for further focus as next year’s AP Chemistry students and teachers seek to extend AP Chem’s super impressive, multi-year trend of stronger content and skill mastery.

Reposted by Amy Roediger

By far the most challenging unit for AP Chemistry students was Acids and Bases (Unit 8); 7% of students earned every point possible for this unit, and 6% of students, generally those who are receiving 1s, were unable to answer any question about this unit correctly.

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Setting aside Atomic Structure and Properties (Unit 1), which a massive 34% of AP Chemistry students aced by answering every such question right, students demonstrated strongest mastery of Thermochemistry (Unit 6); 18% earned every point possible for that unit.

Reposted by Amy Roediger

Equating data, which looks at each group’s performance on re-used MCQs, also confirms that this year’s group, on average, was stronger than prior years’ groups, demonstrating stronger chemistry content knowledge and skills, so scores increased.

Reposted by Amy Roediger

Multiple-Choice Questions This year, the mean number of correct MCQs was 36.99, compared to 35.00 last year, and 33.65 in 2023. On the make-up date this year, for which I have the multiple-choice data (but not yet the free-response data), the mean number of correct MCQs was 35.82.

Reposted by Amy Roediger