Diagnose Before You Teach

The Same 76, Two Very Different Answer Sheets

On the level test ahead of the spring 2026 term, two students scored an identical 76. By the Epic Prep placement chart, that means the same class, the same textbook, the same pace. The evening after grading, I spread the two answer sheets side by side on my desk and studied them for a long while. Going by the score alone, there was no reason to tell them apart.

But the wrong answers sat in different places. One student got 18 of the 20 vocabulary items right and left all four questions on the final long reading passage blank. That means the clock ran out. The other missed nine vocabulary items but read that long passage to the end and answered three of its questions correctly. Here was a student who could skip unknown words without losing the thread of the text.

The total score says these two students are the same. The answer sheets say they get stuck in entirely different places. For the person responsible for curriculum, that mismatch becomes a question you cannot just wave past. Even if seating them in the same class is right, is handing them the same prescription right too?

Last Year’s Mistake: Building Classes on Total Scores Alone

For last year’s summer term, we divided classes by total score band and nothing else. Twelve students who landed in the same band got the same textbook and ran on the same pacing chart, and before six weeks had passed, four requests for reassignment came in. Two students said the class moved too fast; two said it was too easy. Every one of them had entered through the same score band.

The mistake we kept repeating back then was in how we responded. When scores dropped, we moved the textbook down a level; when they rose, we moved it up. We were tinkering with outcomes without ever looking at where a student was stuck or why. Looking back now, what we were building was closer to a pacing chart than a curriculum. And all the while we were revising the pacing chart, the stuck student stayed standing in the same spot.

Two Students, Two Prescriptions

This spring, we layered one more round of diagnostics on top of placement. We measured words per minute through read-alouds, logged solving time separately for each passage, and ran a vocabulary breadth checklist. The first student read aloud at 78 words per minute, well below the peer benchmark, and doubled back over single sentences two or three times. The second read smoothly at 121 words per minute but stalled at 55 percent on the vocabulary checklist. Every one of these records went into Rubric, where we reviewed them together with the homeroom teachers.

That is where the prescriptions split. The first student kept the same textbook level and picked up fluency training, reading short passages aloud on repeat, along with timed practice sets. The second got a vocabulary notebook and close reading assignments attached to the same textbook. Same class, different homework.

In a consultation, one parent asked, “They are in the same class. Why is the homework different?” I answered, “Because the two of them get stuck in different places. If we assigned the same homework right now, one would be overwhelmed and the other would be bored.” I learned on the spot that this explanation reassures a parent far more deeply than saying the scores are the same.

At the eight-week midpoint check, the two students who had started from the same score were approaching the next level by different roads. The first student’s read-aloud speed had climbed to 103 words per minute, and, for the first time, a long passage got finished from start to end. The second student’s vocabulary accuracy had reached 80 percent.

When the Data and the Teacher’s Eye Disagree

The process was not all smooth. Jamie, the second student’s homeroom teacher, pushed back on the finding of weak vocabulary. “This student is not short on vocabulary. In conversation, this kid reaches for difficult words and uses them well.” The data said weak; the teacher who saw the student every day said strong. We read moments like this as a signal that the diagnostics are one layer short.

So we split the vocabulary items into two versions, one where students listen and choose and one where they read and choose, and measured again. The student knew the words by ear but could not recognize them in print. The data had been right, and so had Jamie’s eye. The prescription changed once more, from vocabulary memorization to exercises linking sound to spelling, and since then our curriculum has kept one order fixed. Diagnosis comes first, and lesson design follows.