Run #774

done rubric v1 session 79240140 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

11. रिक्त स्थानों की पूर्ति करें- 0 तो 8 का न्यूनतम धन मान =........ (i) यदि cos 6 = (ii) यदि sin 6 = 3215 तो 0° से 90° के बीच 8 का मान = .. (iii) यदि √3tan 6 = 1 तो 6 का मान = 17.

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

11. रिक्त स्थानों की पूर्ति करें- (i) यदि cos θ = √3/2 तो θ का न्यूनतम धन मान = ..... (ii) यदि sin θ = 1/√2 तो 0° से 90° के बीच θ का मान = ..... (iii) यदि √3tan θ = 1 तो θ का मान = .....

Audit's summary: The student asked a question about finding the minimum positive value of θ when cos θ = √3/2. The tutor explained that cos θ is positive in the first quadrant and that the minimum positive value of θ is 30°. The tutor also mentioned that there could be other values of θ, but 30° is the minimum positive one. The tutor wrote down the steps to solve the problem and concluded that θ = 30°.

Transcript 1,137 characters · 50 stripped

Read it no speaker labels — tutor and student run together

Hello Ankur, good afternoon. Good afternoon. Which question do you have doubts about? Cos. Cos? Okay. So, your question is cos theta rho 3 by 2. You have to learn theta's minimum value. So, tell me this. What is the positive of your cos theta in which quadrant? Tell me this. Tell me this. Cos theta is positive in this. Now you have to calculate the value of the first quadrant. Because the angle you calculate is in the opposite direction of the needle. So you will get the most optimal value here. So, you will get cos theta equal to root 3 by 2. Now see, there can be two values. One will come in this and the other in this. So, you will get this value. Why? Because the value that will come here will be the minimum. So, tell me, cos theta, root 3 by 2, in the first quadrant, what cos angle is equal to? Now tell me once. The angle of the angle is equal to 30 degrees. The difference between the angles is that the angles are equal. So, if you want to know the value of theta, you can write it down here. यहां से थीता की वैल्यू 330 आ रही है, लेकिन आपको मिनिमम वैल्यू बतानी है, यह आंसर हो जाएगी आपकी, ठीक है? 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 audit's reading of the question, which is what the Product AI judged against:

Transcript 1,137 characters · 50 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 Canvas and problem orientation is upright at 0 degrees

While Frame 1 shows a portrait document, from Frame 2 onwards the question and tutor writing are correctly oriented at 0 degrees upright.

seen · 98% confident
Your view
Writing is legible at video size Handwriting is clear and readable

In Frames 3 to 8, mathematical notation and labels are drawn with clear contrast and adequate spacing on the dark whiteboard.

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 Question is clearly displayed at the top left

Question 11(i) ('यदि cos θ = √3/2 तो θ का न्यूनतम धन मान...') is clearly visible in Frames 2–8.

seen · 98% confident
Your view
Work proceeds in followable steps Working develops sequentially across the canvas

Quadrant layout is established on the right (Frames 2–3) and mathematical deductions follow sequentially on the left (Frames 4–8) without clutter or erasure.

seen · 95% confident
Your view
It reaches an answer Working reaches the complete solution

In Frame 8, both relevant angles (30° and 330°) are derived and the minimum positive value (30°) is finalized.

seen · 95% confident
Your view
Something was actually written board went from 9.67% to a peak of 24.5% covered (+14.82 points), ending at 18.01%

measured
Your view
The concept is named before the working Tutor explicitly mentions quadrant signs and angle values

The tutor states: 'What is the positive of your cos theta in which quadrant?' establishing quadrant-based sign rules for trigonometric ratios.

heard · 90% confident
Your view
Explained rather than jumped to the answer Concept of quadrant sign was explained prior to algebraic solving

The tutor sets up the quadrant diagram and explains positive angles in Frames 2–3 before writing out the equation steps in Frame 4.

heard · 92% confident
Your view
Solved step by step, not in one leap Solution steps progress systematically with justifications

Work appears stage by stage from Frame 3 to Frame 8, showing intermediate quadrant analysis, standard angle identification, and 4th quadrant angle calculation.

heard · 95% confident
Your view
The session opens properly Tutor greets student and confirms question

Transcript confirms greeting: 'Hello Ankur, good afternoon' and confirms the question: 'Which question do you have doubts about? Cos...'.

heard · 95% confident
Your view
No long dead air 0 gaps over 6.0s, 0s total (0% of the session), longest 0s

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 Tutor asks conceptually directed questions

The tutor asks: 'What is the positive of your cos theta in which quadrant?' and 'cos theta, root 3 by 2, in the first quadrant, what cos angle is equal to?'.

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": "orientation",
      "verdict": "ok",
      "headline": "Canvas and problem orientation is upright at 0 degrees",
      "evidence": "While Frame 1 shows a portrait document, from Frame 2 onwards the question and tutor writing are correctly oriented at 0 degrees upright.",
      "confidence": 0.98
    },
    {
      "key": "legibility",
      "verdict": "ok",
      "headline": "Handwriting is clear and readable",
      "evidence": "In Frames 3 to 8, mathematical notation and labels are drawn with clear contrast and adequate spacing on the dark whiteboard.",
      "confidence": 0.95
    },
    {
      "key": "question_captured",
      "verdict": "ok",
      "headline": "Question is clearly displayed at the top left",
      "evidence": "Question 11(i) ('यदि cos θ = √3/2 तो θ का न्यूनतम धन मान...') is clearly visible in Frames 2–8.",
      "confidence": 0.98
    },
    {
      "key": "structure",
      "verdict": "ok",
      "headline": "Working develops sequentially across the canvas",
      "evidence": "Quadrant layout is established on the right (Frames 2–3) and mathematical deductions follow sequentially on the left (Frames 4–8) without clutter or erasure.",
      "confidence": 0.95
    },
    {
      "key": "completion",
      "verdict": "ok",
      "headline": "Working reaches the complete solution",
      "evidence": "In Frame 8, both relevant angles (30° and 330°) are derived and the minimum positive value (30°) is finalized.",
      "confidence": 0.95
    },
    {
      "key": "concept_named",
      "verdict": "ok",
      "headline": "Tutor explicitly mentions quadrant signs and angle values",
      "evidence": "The tutor states: 'What is the positive of your cos theta in which quadrant?' establishing quadrant-based sign rules for trigonometric ratios.",
      "confidence": 0.9
    },
    {
      "key": "explained_before_solving",
      "verdict": "ok",
      "headline": "Concept of quadrant sign was explained prior to algebraic solving",
      "evidence": "The tutor sets up the quadrant diagram and explains positive angles in Frames 2–3 before writing out the equation steps in Frame 4.",
      "confidence": 0.92
    },
    {
      "key": "concept_checked",
      "verdict": "ok",
      "headline": "Tutor asks conceptually directed questions",
      "evidence": "The tutor asks: 'What is the positive of your cos theta in which quadrant?' and 'cos theta, root 3 by 2, in the first quadrant, what cos angle is equal to?'.",
      "confidence": 0.9
    },
    {
      "key": "step_by_step",
      "verdict": "ok",
      "headline": "Solution steps progress systematically with justifications",
      "evidence": "Work appears stage by stage from Frame 3 to Frame 8, showing intermediate quadrant analysis, standard angle identification, and 4th quadrant angle calculation.",
      "confidence": 0.95
    },
    {
      "key": "opening",
      "verdict": "ok",
      "headline": "Tutor greets student and confirms question",
      "evidence": "Transcript confirms greeting: 'Hello Ankur, good afternoon' and confirms the question: 'Which question do you have doubts about? Cos...'.",
      "confidence": 0.95
    }
  ]
}

Duration	200s (3.3 min)
Video	1280×800 @ 10.0fps
Audio track	yes
Shot changes
Dead air	0 gaps ≥6.0s · 0s total · longest 0.0s
Luma	avg 64.4 · min · max
Medium	board 78.6% flat background
Content written	9.67% → 18.01% (+14.82)
Transcript	1137 characters of speech
Frames	8

Run #774

The recording

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

Transcript 1,137 characters · 50 stripped

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

Transcript 1,137 characters · 50 stripped

Review team

Product AI

Measured

What the model returned verbatim

Frames in order, one every ~25s