A couple of weeks ago I wrote to Jamie Benigna (Director AP Chemistry Curriculum, Instruction, and Assessment) to ask about an error that I spotted in one of the questions used in the AP Chemistry ‘exam’ in 2020. Here’s an extract from the email that I sent to him.
In VR216985 (and I guess other questions that use the same data), X in parts j and k appears to clearly be Mg (consistent with most of the data shown), which would mean there is a typo in the question for the 4th ionization energy.
Essentially the data presented gave an incorrect 4th ionization energy (The correct value being 10,600 kJ/mol and the value given being much higher).
Today I received confirmation from Benigna that indeed it was an error, and that this error appeared on the actual ‘exam’ of those students that had that question. Here’s part of his reply.
When you access the question in AP Classroom, there should be the following footnote: (He then gave a screenshot of the footnote that describes the College Board’s error, and that can be seen in AP Classroom).
Please let me know if the footnote does not appear when you view the question, and I will alert the AP Classroom team to correct the file. The Question Leader for this prompt did not report any instances of students attempting to use the split between IE3 and IE4 in their response, but it was a conditionality that Readers were trained to address in their scoring.
Regarding his last sentence in bold above, I’m afraid that he misses the point, and the damage has been done at this point. His implication that no student used the incorrect data, so ‘all is well’, is UTTERLY false and misleading. Here’s my response to his reply which explains why this is nowhere near good enough.
Of course, the fact that no kid referred to the IE3/IE4 split is not the point at all! In the ‘exam’ this year, given the enormous pressure, and all of the other unhelpful factors surrounding it, a mistake like that in the question was bound to be horribly distracting to many students, almost certainly disadvantaged a number of kids, and cost them points. As an ex-teacher, you know how things like this can cause a real problem, especially for high achieving kids that see the error, and find it debilitating as they try to somehow rationalize it, and time ticks by. I believe I have at least one such student who was hurt by this mistake.