Run #763

done rubric v1 session 79221414 gemini-3.7-flash 2026-09-21 02:21

What the student sent the question as it arrived, then each reading of it

OCR of the image GOOGLE_VISION

Type-II (A.V.& A.S] 8. A car travel at a rate of 30 kmh-1 for 5 minutes after then at rate 40 kmh-1 for 10 minutes then find average speed of car [Ans. 36.6 kmh-1] after then he goes at speed 20 kmh-1

The phone's own reading, which differs:

ar then find average speed of car t sneed 20 kmh1 [Ans. 36.6 kmh] Type - II (A.V.& A.S] 8. A car travel at a rate of 30 kmh for 5 minutes after then at rate 40 kmh for 10 minutes then

The audit's reading of the question, which is what the Product AI judged against:

Type-II (A.V.& A.S] 8. A car travel at a rate of 30 kmh-1 for 5 minutes after then at rate 40 kmh-1 for 10 minutes then find average speed of car [Ans. 36.6 kmh-1]

Audit's summary: The student asked for help with a word problem involving calculating the average speed of a car. The tutor explained the steps to solve the problem, including converting minutes to hours, using the formula for average speed, and performing the calculations. The tutor also provided the final answer. The student seemed to understand the explanation and thanked the tutor.

Transcript 1,376 characters · 452 stripped

Read it no speaker labels — tutor and student run together

Hello Bintu Kumar. Yes Sir, tell me. Can you hear me? Yes Sir, I can hear you. I have a problem with this question. If there is any problem or if you don't understand, ask me again and I will tell you again and make sure that you understand the question. The following is a complete request that you stay until the second candle so that I can tell you the complete solution. It is said that the cart travels at a rate of 30 km per hour for 5 minutes. After that, at a rate of 40 km per hour for 10 minutes, then find the average speed of the cart. First of all, see what we have. आवर में चेंज करोगे तो क्या करोगे? 5 बटा 60 बटा आवर में क्या हो गया है? 1 बटा 12 आवर अच्छा वी टू हमारे पास क्या दे रखता है? 40 किलो मीटर पर आवर. ठीक है? और T2 इसके लिए क्या दे रखता है? T2 दे रखता है 10 मिनित. इसका कहने का मतलब क्या है? कि 10 अपोन में 60. इसका मतलब क्या हो जाएगा? 1 बटा में 6 आवर. ठीक है? समझ लिएगा. Average Speed is equal to Speed times Time. So, first of all, we will calculate the speed. Then only we will be able to calculate the speed. If you want to calculate the average speed, then what is the formula? Average speed is equal to V1 into T1 plus V2 into T2 upon T1 plus T2 So, if you add the average speed here, then we will get 30 x 5, plus 40 x 10, upon 5 plus 10, so 30 x 5 is 150, 40 x 9 is 400, and 15. Thank you so much. Have a great day. Take care. Bye. All the best.

What the student sent the question as it arrived, then each reading of it

OCR of the image GOOGLE_VISION

The phone's own reading, which differs:

ar then find average speed of car t sneed 20 kmh1 [Ans. 36.6 kmh] Type - II (A.V.& A.S] 8. A car travel at a rate of 30 kmh for 5 minutes after then at rate 40 kmh for 10 minutes then

The audit's reading of the question, which is what the Product AI judged against:

Type-II (A.V.& A.S] 8. A car travel at a rate of 30 kmh-1 for 5 minutes after then at rate 40 kmh-1 for 10 minutes then find average speed of car [Ans. 36.6 kmh-1]

Transcript 1,376 characters · 452 stripped

Read it no speaker labels — tutor and student run together

Review team

no_issue

Product AI

nothing found

teaching Yes · mistakes No · satisfactory Yes

Each verdict takes your own. Yours is stored against the stack's, so “where is it wrong most often” is a question with an answer.

Work is the right way up Not applicable to a board session

seen
Writing is legible at video size Handwriting is neat, well-sized, and easy to read against the dark background.

In frames 2 through 8, all written equations, numbers, and text annotations are clear, appropriately sized, and have strong contrast.

seen · 95% confident
Your view
The work fills the frame Not applicable to a board session

seen
Nothing distracting in shot Not applicable to a board session

seen
The student's problem is established The problem statement is clearly displayed at the top of the whiteboard.

While frame 1 shows the image rotated sideways, frame 2 onwards shows the printed question text upright and fully readable at the top of the screen.

seen · 95% confident
Your view
Work proceeds in followable steps Work is neatly organized and moves logically between stages.

Frames 2-3 list given quantities and unit conversions, frames 4-5 show the average speed formula and arithmetic calculation to find 36.6 km/h, and frame 7 shows the underlying distance breakdown.

seen · 90% confident
Your view
It reaches an answer The problem is completely solved with a final numerical answer.

Frame 5 and Frame 8 show the completed calculation yielding 36.6 km/h.

seen · 95% confident
Your view
Something was actually written board went from 3.98% to a peak of 9.62% covered (+5.63 points), ending at 3.92%

measured
Your view
The concept is named before the working The tutor explicitly names the concept of average speed.

The tutor states in the transcript: 'find the average speed of the cart' and 'Average speed is equal to V1 into T1 plus V2 into T2 upon T1 plus T2'.

heard · 90% confident
Your view
Explained rather than jumped to the answer The tutor moves directly into data listing and solving rather than pre-explaining the core concepts.

Immediately after reading the question prompt, the tutor begins listing variables (v1, t1, v2, t2) and converting units in Frame 2 and 3.

heard · 85% confident
Your view
Solved step by step, not in one leap The tutor works through the solution methodically step by step.

Frames 3 to 5 show the progression from listing the parameters to setting up the weighted average formula and executing the simplification step by step.

heard · 90% confident
Your view
The session opens properly The tutor greets the student by name and confirms the question before starting.

The transcript starts with 'Hello Bintu Kumar. Yes Sir, tell me. Can you hear me?' and confirms the question before proceeding.

heard · 95% confident
Your view
No long dead air 1 gaps over 6.0s, 12s total (3% of the session), longest 12s

Silence is below -35.0dB — a crude measure on a phone microphone, so treat a low count as weak evidence rather than proof the tutor was talking.

measured
Your view

Observations judged, but not counted as the lab objecting

The camera holds still Not applicable to a board session

Not counted: Measured over 183 known-bad and 29 known-good camera sessions (2026-09-21): raised on 87% of the bad and 86% of the good, and the motion distributions are the same shape — median frame difference 25 on the bad set, 27 on the good. No threshold on this number separates them, so it is reported and not counted.

measured
Exposure is usable Not applicable to a board session

Not counted: Same two sets: it raised 6 of 183 known-bad and 2 of 29 known-good sessions. Both too few to mean anything, and the brightness distributions overlap almost exactly. The earlier reading that it 'fires more on clean sessions' was two sessions out of twenty-nine — noise, not an inverted rule.

measured
Understanding of the concept is checked Checks are mostly rhetorical or basic recall rather than deep conceptual probes.

The tutor asks 'आवर में चेंज करोगे तो क्या करोगे?' and 'If you want to calculate the average speed, then what is the formula?', but immediately continues without an identifiable student response.

Not counted: Raised on 87% of known-bad and 80% of known-good sessions. The criterion is honest about why in its own `why`: the transcript has no speaker labels, so a real check and a rhetorical 'ok?' are often indistinguishable, and the bar ends up one almost no session clears. Still judged and shown, because reading it beside a recording is how it gets better.

heard
Your view

What the model returned verbatim

{
  "findings": [
    {
      "key": "legibility",
      "verdict": "ok",
      "headline": "Handwriting is neat, well-sized, and easy to read against the dark background.",
      "evidence": "In frames 2 through 8, all written equations, numbers, and text annotations are clear, appropriately sized, and have strong contrast.",
      "confidence": 0.95
    },
    {
      "key": "question_captured",
      "verdict": "ok",
      "headline": "The problem statement is clearly displayed at the top of the whiteboard.",
      "evidence": "While frame 1 shows the image rotated sideways, frame 2 onwards shows the printed question text upright and fully readable at the top of the screen.",
      "confidence": 0.95
    },
    {
      "key": "structure",
      "verdict": "ok",
      "headline": "Work is neatly organized and moves logically between stages.",
      "evidence": "Frames 2-3 list given quantities and unit conversions, frames 4-5 show the average speed formula and arithmetic calculation to find 36.6 km/h, and frame 7 shows the underlying distance breakdown.",
      "confidence": 0.9
    },
    {
      "key": "completion",
      "verdict": "ok",
      "headline": "The problem is completely solved with a final numerical answer.",
      "evidence": "Frame 5 and Frame 8 show the completed calculation yielding 36.6 km/h.",
      "confidence": 0.95
    },
    {
      "key": "concept_named",
      "verdict": "ok",
      "headline": "The tutor explicitly names the concept of average speed.",
      "evidence": "The tutor states in the transcript: 'find the average speed of the cart' and 'Average speed is equal to V1 into T1 plus V2 into T2 upon T1 plus T2'.",
      "confidence": 0.9
    },
    {
      "key": "explained_before_solving",
      "verdict": "weak",
      "headline": "The tutor moves directly into data listing and solving rather than pre-explaining the core concepts.",
      "evidence": "Immediately after reading the question prompt, the tutor begins listing variables (v1, t1, v2, t2) and converting units in Frame 2 and 3.",
      "confidence": 0.85
    },
    {
      "key": "concept_checked",
      "verdict": "weak",
      "headline": "Checks are mostly rhetorical or basic recall rather than deep conceptual probes.",
      "evidence": "The tutor asks 'आवर में चेंज करोगे तो क्या करोगे?' and 'If you want to calculate the average speed, then what is the formula?', but immediately continues without an identifiable student response.",
      "confidence": 0.8
    },
    {
      "key": "step_by_step",
      "verdict": "ok",
      "headline": "The tutor works through the solution methodically step by step.",
      "evidence": "Frames 3 to 5 show the progression from listing the parameters to setting up the weighted average formula and executing the simplification step by step.",
      "confidence": 0.9
    },
    {
      "key": "opening",
      "verdict": "ok",
      "headline": "The tutor greets the student by name and confirms the question before starting.",
      "evidence": "The transcript starts with 'Hello Bintu Kumar. Yes Sir, tell me. Can you hear me?' and confirms the question before proceeding.",
      "confidence": 0.95
    }
  ]
}

Duration	413s (6.9 min)
Video	1280×800 @ 10.0fps
Audio track	yes
Shot changes
Dead air	1 gaps ≥6.0s · 12.0s total · longest 12.0s
Luma	avg 45.3 · min · max
Medium	board 93.4% flat background
Content written	3.98% → 3.92% (+5.63)
Transcript	1376 characters of speech
Frames	8

Run #763

The recording

What the student sent the question as it arrived, then each reading of it

Transcript 1,376 characters · 452 stripped

What the student sent the question as it arrived, then each reading of it

Transcript 1,376 characters · 452 stripped

Review team

Product AI

Measured

What the model returned verbatim

Frames in order, one every ~52s