For some of my students, the exams were mostly a review from content they learned in high school, but for others, the content was so beyond what they could comprehend because they lacked the basic knowledge I assumed they would have had in high school. How on earth is an “objective” exam supposed to measure learning under these conditions?
To answer her question, they objectively understand high school level science or they objectively do not.
Not just English. The article links to this one about doing it in a general science course. The quote that sums it up:
To answer her question, they objectively understand high school level science or they objectively do not.