How Tutors Can Use Student Performance Data to Build Better Study Plans

Picture two students who both score a 1320 on their first diagnostics. One is shaky on grammar rules. The other knows the content cold but runs out of time halfway through the second module. Give them both the same "two more practice tests this week" plan and you've wasted a week for at least one of them, probably both.

That gap is what performance data is supposed to close. But plenty of centers collect piles of score reports and still hand out generic plans, because nobody has a repeatable way to get from "here's the report" to "here's what you do this week." If you want student performance data study plans that actually change what happens in sessions, you need that bridge.

In this blog, we're sharing the thoughts of Rhea Wanchoo, co-founder of M&W Education, from her conversation on the EdisonOS Podcast. Rhea is a UC Berkeley neuroscience and psychology student who works with 20 to 30 SAT, ACT, and AP tutoring students a year. Her approach to student growth is "diagnosing the pattern, building a structured plan and tracking measurable progress." She says her students have moved from the 1450s–1460s into the 1540–1550 range. We've paired the practical moves she describes with published research and turned them into a framework you can reuse across your center. The framework and scoring system below are our synthesis of those ideas, not a framework Rhea formally names in the podcast.

Why a total score makes a weak study plan

Each section is split into two modules, and how a student does in the first decides the difficulty mix of the second, so early accuracy affects both the score and the route through the test (College Board). Rhea describes the shift to digital as easier mechanically but harder strategically. A total score can tell you where a student landed, but not always why they landed there.

A stronger study plan looks at patterns such as:

• Early accuracy: Mistakes in the first module can affect the difficulty mix of the second.
• Attention stamina: A student may know the material but struggle to maintain focus throughout the test.
• Navigation habits: Getting comfortable with the digital testing experience can affect execution.
• Test-day stress: Rhea has seen students score 1580 or 1600 on practice tests and then land well below that on the real exam. In her view, that's not necessarily a content problem. Stress and execution can play a major role.
• Performance patterns: Looking beyond the total score helps tutors identify what actually needs attention and build a more targeted plan.

Our adaptive testing guide goes deeper on how the digital SAT's adaptive structure works.
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Start with a clean baseline

Rhea's team starts SAT and ACT students with a diagnostic taken with no studying beforehand. Even a little prep, she explains, blurs the picture of where a student is lacking. A cold baseline shows what's strong and what needs work right away. For AP, her approach is different. She focuses on where the student is in the school year and builds from there, since AP isn't a new test form every time.

For owners, the takeaway is consistency. Use the same diagnostic format and conditions for every new student, so the data is comparable across tutors and cohorts. A diagnostic test works best when it covers the whole exam, whether that's the Digital SAT, the ACT, or the PSAT.
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The Miss-to-Plan framework: from missed questions to weekly priorities

Building on Rhea’s approach, we can turn those ideas into a four-step framework: Tag, Rank, Assign, Recheck.

Step 1: Tag every miss

When Rhea reviews a diagnostic, the first thing she looks at is the type of error:

"I really just prioritize the error type breakdown. So was it a concept error? Was it a matter of time? Was it carelessness? … And then the second, if not tied with that first point, is really just the easy-medium misses. Like, where can we make those fast score gains?"

Rhea Wanchoo, M&W Education · Listen to the episode

Turn that into a simple tagging sheet. Every missed question gets three tags:

Add one flag for fade: did the misses cluster near the end of a section? Rhea calls the section pacing curve one of the most overlooked metrics. Some students start strong and falter late, and that's a stamina problem, not a content one. She also watches for time sinks (where the minutes disappear) and repeat mistakes, which show up as patterns across tests.

Step 2: Rank the patterns

You'll usually find more patterns than a student can fix in one week. Score each one:

This scoring system is our editorial rule of thumb, not a framework Rhea presented in the podcast or a published standard, so adjust the weights to fit your students. It is based on Rhea’s emphasis on repeat misses and easy/medium misses as places where students can make quick gains, because once a consistently missed question type is fixed, the score can move quickly.

One guardrail: don't rank off a single test. The U.S. Department of Education's IES practice guide on using student data recommends checking multiple data sources against each other, because no single assessment tells you everything. Cross-check the diagnostic against homework and quiz results before you commit to a priority.

Step 3: Assign the fix that matches the cause

This is where most plans go wrong, because they default to more practice tests. Rhea is blunt about it:

"Reinforcing the content knowledge is equally as important as taking endless practice tests, because taking a practice test week after week is only going to do so much good for the student."

Rhea Wanchoo, M&W Education · Listen to the episode

Match the assignment to the cause:

Build in low-stakes retrieval and spacing while you're at it. In a major review of ten learning techniques, practice testing and distributed practice earned the highest utility ratings because they help learners of different ages and abilities across many kinds of tasks (Dunlosky et al., 2013). Rereading explanations isn't in that category.

Step 4: Recheck within the week

Every priority gets a quick recheck: a 10-question mini-set or a short quiz before the next session. If the pattern is fixed, move it to a light maintenance rotation and bring in the next one. If it's not, change the fix, not just the volume.

Speed matters here. The IES guide recommends returning assessment data to students within a week, and it suggests setting aside 10 to 15 minutes for students to work through their own results rather than glance at the score. It even includes a "Learning from Math Mistakes" worksheet where students record why they missed each problem, separating careless slips from concepts they still need to learn. That's an error log, and students can keep it themselves.

Want to see an error log in action? The same idea follows naturally from Rhea’s approach in this episode: identify the recurring pattern behind a miss, address the underlying weakness, and then check whether the pattern changes. The podcast does not present a formal “error log” system, so the example below is a practical extension of the approach she describes.

A worked example (illustrative)

Here's how it plays out for an imaginary student with 12 misses on a Reading and Writing diagnostic, already flagged on a previous test for one recurring issue.

The week's plan:

• Priority 1: Words in context. Vocabulary practiced in sentences, then a short paragraph using each word.
• Priority 2: Punctuation boundaries. Rule review plus a few sentence-diagramming exercises.
• Priority 3: Pacing. One timed set focused on the back half of a module.
• Maintenance: A five-question mixed set, plus a two-minute checking routine to cut careless slips.
• Recheck: A 10-minute quiz before the next session.

That's a real plan a tutor can run, and a parent can follow.
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How to roll this out across your whole center

Standardize the tags. If one tutor writes "grammar" and another writes "punctuation," your data turns to mush. The IES guide recommends agreeing on a shared vocabulary for the terms your team uses.

Hold a short weekly pattern review. Thirty minutes is enough. Look at the top misses across your cohort, decide which ones deserve a group class, and check which fixes actually worked. The IES guide recommends structured time for staff to look at data together with a focused agenda.

Don't only invest in students near their target. The IES guide warns against pouring extra effort into students just below a cutoff, since a single score is imprecise and students further away often have needs just as distinct.

Show parents the process. Rhea says a big source of new clients at M&W is referrals from families who see their student improving and describe the process as calm, organized, and structured, with measurable progress and clear timelines. A visible plan is a marketing asset.
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What the research says (and where it runs out)

• Feedback works, if it's the right kind. A landmark review found that feedback is among the most powerful influences on learning, but its effect can be positive or negative depending on the type and how it's delivered (Hattie & Timperley, 2007). Specific, actionable feedback ("you've missed words in context on three tests") beats a score.
• Retrieval and spacing beat rereading. 
• Data-driven planning is best practice, but the evidence is thinner. The IES panel rated all five of its recommendations as low evidence, noting that rigorous studies are hard to run, though it still called them priorities. In other words, this is expert-backed practice, not a proven formula. Treat your first month as a test, and track whether your rechecks show improvement.
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Put it to work this week

You don't need a new system to start. Pull your last five diagnostics, tag the misses, and rank the patterns. If you'd rather not do that by hand for every student, EdisonOS diagnostic reports show a skill heatmap, difficulty breakdown, time-sink detection, and answer-change tracking, and every student's first diagnostic is free. Start your free trial or book a demo to see it with your own students. Want a feel for the student experience first? Try a free Digital SAT practice test or a free ACT practice test.

FAQs

How do I turn student performance data into study plans?

Tag each missed question by cause, skill, and difficulty. Rank the patterns by how often they repeat and how fixable they are. Assign the fix that matches the cause, then recheck within the week.

What counts as student performance data?

Anything that shows how a student performs and why: diagnostic and practice test results, homework and quiz misses, time per question, pacing across a section, and answer changes. Multiple sources give a more reliable picture than one test.

How many priorities should a student have each week?

Two or three is a good rule of thumb. More than that and nothing gets enough repetition to stick. Anything already fixed moves into light maintenance.

What's the difference between a concept error and a careless error?

A concept error means the student doesn't yet know the rule or method. A careless error means they knew it and slipped. The fixes are different: reteaching and drills for concepts, checking routines for carelessness.

Do I need software, or can I use a spreadsheet?

You can start in a spreadsheet, and it's a good way to learn the process. It gets heavy once you're tagging hundreds of misses across many students. A platform with built-in diagnostic reports removes the manual work.

Does this work for AP prep too?

Yes, with a twist. Rhea's team focuses on where an AP student is in the school year rather than a cold-start baseline. The tagging and ranking logic still applies to unit quizzes and free-response practice.
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