How to Read a College's Common Data Set

Nearly every American college fills out the Common Data Set: a standard list of questions, answered the same way by every school that participates, covering admission, enrollment, cost, and aid. Most schools post their answers as a PDF or spreadsheet on their institutional research office's website, and searching the school's name plus "Common Data Set" will usually find it. It is the closest thing to a college describing its own admissions process in its own words, with no ranking site in between.

The thing almost nobody tells you before you open one: a single filing is not a single snapshot in time. The 2025–26 edition reports admissions numbers for the class that enrolled in fall 2025, asks about test policy for admission in fall 2027, quotes costs for the 2026–27 academic year, and lets the school choose which year the financial aid dollars describe. Four reference points, one document, and the year is printed next to each item rather than on the cover. Read the item's own wording before you use its number, because the number is useless without knowing who and when it counted.

What is the Common Data Set, exactly?

The front page of the template says it plainly. The CDS is "a collaborative effort among data providers in the higher education community and publishers as represented by the College Board, Peterson's, and U.S. News & World Report," with the goal of improving "the quality and accuracy of information provided to all involved in a student's transition into higher education, as well as to reduce the reporting burden on data providers."

Then comes the sentence worth sitting with: "The CDS is a set of standards and definitions of data items rather than a survey instrument or set of data represented in a database."

Three consequences follow from that one line, and they explain most of what is confusing about the document.

What is in each section?

The form runs A through J, and knowing the map saves most of the scrolling.

Using section C to sort schools into reaches, targets, and likelies is a separate job with its own method, covered in how to build a balanced college list. This post is about reading the document itself.

Why does one filing contain four different years?

Because the items were written to answer different questions, and each one carries its own cohort. In the 2025–26 edition, all four of the following appear in the same file:

None of this is sloppiness. It is a form that asks about things which genuinely happen on different clocks. But it does mean the sentence "according to the 2025–26 Common Data Set" is not specific enough to be worth writing down. Name the item.

What does item C7 actually tell you?

C7 is the item everyone quotes and the item most often over-read. It asks for the "relative importance of each of the following academic and nonacademic factors in your first-time, first-year, degree-seeking general (not including programs with specific criteria) admission decisions," and it gives the school exactly four buckets: Very Important, Important, Considered, Not Considered.

There are eighteen rows — six academic and twelve nonacademic:

Two things about this item are worth knowing before you build an argument on it.

C7 carries no year at all. Unlike C1, C8 and G, the item never says which cycle it describes. It is the school's account of how it weighs factors, filed alongside data about last fall's class, and you cannot tell from the form whether it describes the decisions just made or current practice.

The four buckets are coarse, and separate rows are genuinely separate. "Interview" and "level of applicant's interest" are two different rows, and schools land on opposite combinations of them — the case worked through in what an alumni interview actually is. Whether a school counts your interest at all is its own question, covered in does demonstrated interest matter. The first and third academic rows are worth lining up the same way: reading "rigor of secondary school record" against "academic GPA" across ten filings answers whether course rigor matters more than GPA, and the glossary's definition of a secondary school record complicates the comparison before you start.

What happens when C7 and C8 disagree?

They can, and the resulting contradiction is the best argument for reading the whole section instead of one row.

Take Cornell's 2025–26 filing. In C7, standardized test scores are marked Considered — the second-weakest of the four ratings, below the essay, the recommendations, and extracurricular activities, all of which Cornell marks Very Important. In C9, only 43 percent of enrolled first-year students submitted an SAT score and 13 percent an ACT. Read those two items alone and you would conclude that Cornell is a school where testing barely matters.

Now read C8A in the same file, the item that asks about fall 2027 admission. Cornell checks "required to be considered for admission."

Both are true. The C7 and C9 answers describe students who enrolled in fall 2025 and applied under a test-optional policy. The C8 answer describes the policy facing anyone applying now. Cornell's own standardized testing policy page confirms the second: "First-year applicants are required to submit SAT or ACT scores when applying to Cornell," and its enrollment FAQ dates the change — "effective for students applying to enroll for fall 2026 or beyond, applicants to all Cornell undergraduate colleges and schools will be required to submit standardized test scores."

The contrast school makes the point in the other direction. Dickinson's 2025–26 filing shows 13 percent of enrolled first-year students submitting an SAT, and its C8 clarification reads "Dickinson College has a test-optional policy" — a position its standardized testing page has held since 1994. Same document, same edition, opposite trajectories.

So the rule is simple and it is the one piece of discipline this whole document needs: for anything you will act on, the school's current admissions page wins. The Common Data Set is a description of what happened; the admissions page is the policy that binds you. Which schools currently require a score is a live question worth checking directly, which is why we maintain a per-school guide to who requires the SAT or ACT.

What do the score ranges in C9 actually describe?

C9 asks for the percent and number of first-time, first-year students "enrolled in Fall 2025 who submitted national standardized (SAT/ACT) test scores," and then for the 25th, 50th and 75th percentile scores among them. Every word of that matters:

Dickinson shows how much the population choice moves the number. Its C9 reports a 25th-to-75th SAT range of 1340–1440 for the 65 enrolled students who submitted one. Its own admissions page advertises a middle 50 percent of 1310–1460 for admitted students. Neither figure is wrong and neither contradicts the other — they count different people. If you are deciding whether your score helps your application, the admitted-student range is closer to the question you are asking, and the broader judgement call is laid out in should you submit a test score to a test-optional school.

How do you check that you read it right?

The admission section is mostly checkbox grids, and checkbox grids are exactly what both human eyes and extraction tools misread. Three cheap habits catch nearly every error:

What will the Common Data Set not tell you?

Four things, and the fourth is the one that causes arguments.

What to do with this

Pick three schools on your list and spend twenty minutes each. For every one, write down four things: the admit rate from C1, what C7 says about the two or three factors you were curious about, the submitter share and score range from C9, and the C8 test policy for the year you are applying. Then open the school's live admissions page and check the last one against it.

The gap between those two sources is where most of the bad advice about a school comes from, and finding it yourself takes less time than reading one forum thread about the same school. It is also a finishable task — "look up C7 for three schools" is something you can do before dinner, in a way that "research my colleges" never is.