Management is proven
when it is recorded.
PRUF is the learning-management platform YEON built in-house. What a student did — and did not do — and when becomes fully visible.
Why we built our own
A system that only tracks attendance cannot tell whether a student actually studied. We manage based not on whether a student “logged in” at the agreed time, but on “what” they did and “how.” That is why we built our own platform instead of using off-the-shelf tools.
Record
What a student did — and did not do — at each hour stays on record.
Analyze
Where they stalled, which mistakes repeat, and where the plan slipped all become visible.
Adjust
What to change next week gets decided. This is where management begins.
Learning Status
Hour-by-hour records
The day is broken into hours, and what the student actually did in each one is written out in plain sentences.
- Hourly activity summaries
- Online time separated from actual studying
- Submissions, grading, and questions in one place
Actual study time
Total hours, days logged in, session counts — and which screens the student spent time on. Studying and looking busy get told apart.
- Cumulative time over 7 and 30 days
- Sessions and days active
- Top activities by time spent
| Student | Total | Days | Top activities |
|---|---|---|---|
| Seoyeon K. | 16h 11m | 6 / 7 | Assignments 4h 55mReading 3h 56m |
| Minjae P. | 19h 4m | 7 / 7 | Assignments 4h 21mReview 3h 58m |
| Junho L. | 9h 56m | 5 / 7 | Assignments 4h 26mSAT 2h 16m |
| Jiwoo C. | 4h 28m | 7 / 7 | Essays 2h 10mChat 44m |
Weekly study plan
Students submit their own study schedules, and PRUF overlays them with actual activity records. The stretches where the plan was not kept show up immediately.
- Per-student schedule submission and review
- Planned versus actual follow-through
- Daily and weekly views
Analysis that goes a level deeper
Which questions the student stalled on, how often they left the test screen, and where the written work went wrong.
The same format as the real test
The digital SAT’s screen layout, question navigator, and Desmos calculator are reproduced exactly as on the real test.
- Same screens and controls as the real exam
- Built-in Desmos graphing calculator
- Module 2 difficulty adapts to Module 1 results
- Scored the same way as the real test
Per-question grading and work review
Students working on a tablet can solve problems by hand, and their instructor reviews that work and gives feedback. It finds the real problem far more effectively than checking answers alone.
- Handwritten work kept on record
- Per-question teacher feedback
- Missed questions collected in one view
The sign was flipped while finding the vertex of the quadratic. The student knows the formula — this is a recurring slip at the application step.
Time spent per question
A correct answer that took more than twice as long as everyone else’s most likely means the concept is not understood yet.
- Per-question time heatmap
- Compared against the peer median
- Time overlaid with right and wrong answers
- Pinpoints the units for the next study plan
The answer was right, but it took 3m 18s. When the same question type repeats like this, that is a signal the concept needs review.
Focus during the test
From the moment the test opens until submission, PRUF records whether the student’s screen stayed on the test. Time away, the number of exits, even copy-and-paste attempts are visible. When grades wobble, the cause can be confirmed in the records — and knowing where focus broke lets us design the next practice differently.
- Time on the test screen versus away
- When they left, and on which question
- Copy, paste, and right-click logging
- Automatic flags when thresholds are crossed
Every assignment planned, none missed
Whenever school posts an assignment or a test date, it gets recorded right then. From that moment on, PRUF reminds as deadlines approach, assigns the supporting material, and collects anything that slipped.
School deadlines and supporting material
Each new school date is logged by subject as it comes up.
- Assignments, quizzes, and test dates logged as they appear
- Overdue items collected and shown separately
- Attachments and score records per item
- Supporting material assigned against the calendar
Slipping subjects get caught first
Subjects that drop below 80 or trend downward get extra practice problems and material so the grade can recover.
- Assignment completion and grade trends
- Daily status record (alert · watch · good)
- Below-threshold subjects collected automatically
- Practice assigned to the subject in one step
Mission Control
Platform activity, the assignments and test dates in the planner, and the chat history with the instructor. Mission Control cross-checks all three records on one screen and turns them into what the instructor handles today.
Platform activity
Practice problems, scores, logins, and submissions
Planner
Assignments, quizzes, test dates, and attachments the student has logged
Chat history
Requests and replies exchanged with the instructor
Material requests
When a date is set but the scope and class materials are missing
Extra practice
When a practice or quiz score falls below the bar
Follow-ups
When the student hasn’t replied to the instructor’s request
Priority order
Nearest tests and assignments first
What YEON checks every day
The students to check on today, the items to handle, and upcoming tests sit on one screen. Every item shows the reason behind it, so why the action is needed is clear at a glance.
- Upload reminders when class materials are missing
- Review items suggested for below-bar scores
- Unanswered material requests become follow-ups
- Instant requests to students who haven’t sent today’s plan
- Sorted by deadline and linked to material requests
At a glance
From the moment a student posts a quiz date to working the extra practice and getting the next set — the steps the student, PRUF, and the instructor each own.
And More
Subject-level management
Every school course a student is taking is registered and managed — including courses without a YEON class, like US History, Adv Chemistry, or AP Pre-Calculus.
1:1 messaging
Students talk directly with the person in charge. Questions get asked the moment they come up, and every conversation stays part of the record.
Screens shown are recreations of the actual UI; all student information displayed is fictional.
- Guidance on what management your student needs, based on where they are now
- A walkthrough of what gets recorded in PRUF and what you will see
- A per-student solution plan delivered after the consultation