Run #767

done rubric v1 session 79481033 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

1. क्या शून्य एक परिमेय संख्या है? क्या इसे आप p और 9 पूर्णांक हैं और 90 है? P के रूप में लिख सकते हैं, जहाँ रूप में न लिखा 9 आप यह ज अपरिमेय संख्य

The phone's own reading, which differs:

और पूर्णाक हैं और क0 है? कथा शुन्य एक परिमेय संख्या है? क्या इसे आप अपरिमेय सख्य आप यह के रूप में लिख सकत है. जप में न लिखा

Also sent during the session: attachment

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

1. क्या शून्य एक परिमेय संख्या है? क्या इसे आप p/q के रूप में लिख सकते हैं, जहाँ p और q पूर्णांक हैं और q≠0 है?

Audit's summary: The student asked if zero is a rational number and if it can be expressed in the form p/q where p and q are integers and q is not zero. The tutor confirmed that zero is a rational number and demonstrated this by showing that zero can be written as 0/2, 0/5, 0/-7, and 0/10, satisfying the condition that p and q are integers and q is not zero.

Transcript 626 characters · 200 stripped

Read it no speaker labels — tutor and student run together

Good morning student. Come to Filo. Nikhil, आवा जा रही है? कैसे हैं? Good. आपका प्रश्न है, क्या सुन एक परिमेशन क्या है? क्या इसे आप P बटकी के रूप में लिख सकते हैं? जहां P और Q पुर्णांक है और Q जीरो ना हो? Thank you. सुन्ये एक पुर्णे संख्या है? सुन्ये एक परिमे संख्या है? पहला बात क्या करतो अंसर हो गया? है. क्यों है? क्योंकि सुन्ये को हम क्या लिख सकते हैं? सुन्ने को हम सुन्ने बाइ 2, 5, माइनर 7 कुछ भी सुन्ने बटा हम कोई भी संग्जा लिख सकते हैं. परिमे संक्या हुआ ना? जो हर है वो कुछ भी हो सकता है. और हमको पता है जीरो बटा कोई भी संक्या वो जीरो होता है. इसके लिए जीरो को हम पी बटा की रूप में लिख सकते हैं. Thank you for watching.

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:

Also sent during the session: attachment

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

Transcript 626 characters · 200 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 and mathematical notation are clear and easy to read.

In frames 2-9, the Hindi text and mathematical expressions (0 = 0/2 = 0/5 = p/q) are written clearly with good contrast on the dark canvas.

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 question is prominently placed and legible across the top of the whiteboard.

In frames 2-9, the printed Hindi question regarding whether zero is a rational number is clearly displayed across the top banner.

seen · 95% confident
Your view
Work proceeds in followable steps The whiteboard is systematically organized without clutter or erasures.

Frames 2 to 6 show logical progression: the main conclusion is written first, followed by fractional examples on the left and condition checks (p=0, q≠0) on the right.

seen · 90% confident
Your view
It reaches an answer The solution and explanation are fully completed.

By frame 6 (and continuing through frame 9), all parts of the question are verified, concluding with p=0, q≠0, and a checkmark.

seen · 95% confident
Your view
Something was actually written board went from 4.92% to a peak of 23.04% covered (+18.11 points), ending at 23.04%

measured
Your view
The concept is named before the working The tutor explicitly states the mathematical concept being addressed.

The tutor explicitly references rational numbers in the transcript: 'सुन्ये एक परिमे संख्या है?' and writes 'शून्य एक परिमेय संख्या है' in frames 3-9.

heard · 90% confident
Your view
Explained rather than jumped to the answer The tutor immediately gives the direct answer before explaining the underlying reasoning.

In the transcript, right after reading the question, the tutor states 'पहला बात क्या करतो अंसर हो गया? है.' and immediately writes the affirmative answer in frames 2-3.

heard · 85% confident
Your view
Solved step by step, not in one leap The explanation methodically breaks down the definition of a rational number.

Frames 3 through 6 show the step-by-step demonstration of representing 0 as 0/2, 0/5, etc., and verifying both integer and non-zero denominator conditions.

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

The transcript shows the tutor starting with 'Good morning student... Nikhil, आवा जा रही है? कैसे हैं?' and reading out the question.

heard · 95% confident
Your view
No long dead air 4 gaps over 6.0s, 54s total (22% of the session), longest 26s

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 The tutor does not ask the student any conceptual questions to check understanding.

The tutor poses rhetorical questions and immediately answers them ('क्यों है? क्योंकि सुन्ये को हम क्या लिख सकते हैं?'), giving no opportunity for the student to explain or demonstrate understanding.

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 and mathematical notation are clear and easy to read.",
      "evidence": "In frames 2-9, the Hindi text and mathematical expressions (0 = 0/2 = 0/5 = p/q) are written clearly with good contrast on the dark canvas.",
      "confidence": 0.95
    },
    {
      "key": "question_captured",
      "verdict": "ok",
      "headline": "The question is prominently placed and legible across the top of the whiteboard.",
      "evidence": "In frames 2-9, the printed Hindi question regarding whether zero is a rational number is clearly displayed across the top banner.",
      "confidence": 0.95
    },
    {
      "key": "structure",
      "verdict": "ok",
      "headline": "The whiteboard is systematically organized without clutter or erasures.",
      "evidence": "Frames 2 to 6 show logical progression: the main conclusion is written first, followed by fractional examples on the left and condition checks (p=0, q≠0) on the right.",
      "confidence": 0.9
    },
    {
      "key": "completion",
      "verdict": "ok",
      "headline": "The solution and explanation are fully completed.",
      "evidence": "By frame 6 (and continuing through frame 9), all parts of the question are verified, concluding with p=0, q≠0, and a checkmark.",
      "confidence": 0.95
    },
    {
      "key": "concept_named",
      "verdict": "ok",
      "headline": "The tutor explicitly states the mathematical concept being addressed.",
      "evidence": "The tutor explicitly references rational numbers in the transcript: 'सुन्ये एक परिमे संख्या है?' and writes 'शून्य एक परिमेय संख्या है' in frames 3-9.",
      "confidence": 0.9
    },
    {
      "key": "explained_before_solving",
      "verdict": "weak",
      "headline": "The tutor immediately gives the direct answer before explaining the underlying reasoning.",
      "evidence": "In the transcript, right after reading the question, the tutor states 'पहला बात क्या करतो अंसर हो गया? है.' and immediately writes the affirmative answer in frames 2-3.",
      "confidence": 0.85
    },
    {
      "key": "concept_checked",
      "verdict": "bad",
      "headline": "The tutor does not ask the student any conceptual questions to check understanding.",
      "evidence": "The tutor poses rhetorical questions and immediately answers them ('क्यों है? क्योंकि सुन्ये को हम क्या लिख सकते हैं?'), giving no opportunity for the student to explain or demonstrate understanding.",
      "confidence": 0.9
    },
    {
      "key": "step_by_step",
      "verdict": "ok",
      "headline": "The explanation methodically breaks down the definition of a rational number.",
      "evidence": "Frames 3 through 6 show the step-by-step demonstration of representing 0 as 0/2, 0/5, etc., and verifying both integer and non-zero denominator conditions.",
      "confidence": 0.9
    },
    {
      "key": "opening",
      "verdict": "ok",
      "headline": "The tutor greets the student and reads the question before starting.",
      "evidence": "The transcript shows the tutor starting with 'Good morning student... Nikhil, आवा जा रही है? कैसे हैं?' and reading out the question.",
      "confidence": 0.95
    }
  ]
}

Duration	246s (4.1 min)
Video	1280×800 @ 10.0fps
Audio track	yes
Shot changes
Dead air	4 gaps ≥6.0s · 54.5s total · longest 26.0s
Luma	avg 63.1 · min · max
Medium	board 78.1% flat background
Content written	4.92% → 23.04% (+18.11)
Transcript	626 characters of speech
Frames	9

Run #767

The recording

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

Transcript 626 characters · 200 stripped

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

Transcript 626 characters · 200 stripped

Review team

Product AI

Measured

What the model returned verbatim

Frames in order, one every ~27s