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Coaching batches move at one speed for everyone. If your child is still copying one derivation when the next begins, the problem is often pace, not ability. Start by changing how they use recordings and doubt sessions; consider another batch only if the gap stays.
How do you know the coaching pace is too fast?
Look for patterns that last two or three weeks, not one bad day:
Class notes stop halfway through, or are copied with no working shown.
Homework from the same chapter piles up, while revision of earlier chapters never starts.
Your child understands a topic when someone goes through it slowly, but can't follow it in class.
Test mistakes come from an earlier idea (fractions in a kinematics problem, mole concept in stoichiometry), not from the new chapter.
They stop asking doubts because "by the time I ask, the class has moved on".
If marks fell all at once, or sleep, appetite or mood changed, check those first: pace problems build slowly.
Why does a fast lecture leave some students behind?
A live class is one continuous stream, and a student can't pause it. Research on multimedia learning calls the alternative "segmenting": giving the material in short, meaningful pieces that the learner moves through at their own pace. A meta-analysis of the segmenting effect in Educational Psychology Review pooled 56 investigations. It found that learner-paced segments improved retention and transfer by a small to medium amount and lowered overall cognitive load, though it also took more time.
So a recording your child can pause after each idea can work differently from the live class, if they use it in pieces rather than as a second full lecture.
How should your child use recorded lectures to catch up?
To catch up on one lecture:
Before pressing play, write down from memory what the class covered: the headings, one formula, one example.
Watch only the parts where that list has a gap. Pause after each idea and say the step aloud before moving on.
At the end, close the video and solve one problem from that lecture without looking.
Write anything still unclear on a "doubt card": the topic, the exact line where it stopped making sense, and what they tried.
Step 1 matters. In a study by Roediger and Karpicke in Psychological Science, students who took recall tests on prose passages remembered substantially more two days or a week later than students who restudied instead, even though restudying looked better on a test five minutes later.
What about watching at 1.5x to save time? A UCLA study in Applied Cognitive Psychology found little loss in comprehension between 1x and 2x speed, but performance dropped above 2x. For a child who is behind, a safer rule is to play the parts they already follow faster and the confusing parts at normal speed. If recordings have piled up, use our guide to clearing a recorded lecture backlog with triage and a weekly cap.
If the doubt card keeps pointing back to an older idea, the Fermi Concept Library gives every concept in physics, chemistry, biology, mathematics and computing its own lesson and its place in the map, so your child can look up that older idea on its own.
How do you make doubt sessions actually help?
Your child should arrive with two or three doubt cards, not "I didn't get the chapter". A precise question is easier to answer quickly. Something they can say:
"Sir, in Tuesday's projectile class I followed up to splitting the velocity into components. I don't see why the vertical acceleration is still g at the top. I tried the board example and got stuck here."
If your child finds it hard to speak up, these small steps for a child too shy to ask doubts help.
When should you consider a different batch?
Ask for a meeting with the faculty before you decide. Bring the doubt cards and the weekly count, and ask three things: where your child stands, whether a slower or foundation batch exists, and whether changing midway means repeating chapters. Our guide on how to talk to coaching teachers about your child's progress has questions you can use.
A different batch is worth a serious look when:
the gap is in earlier topics the current batch will not revisit;
the routine above has been followed for three weeks and the count is still flat;
your child spends most evenings catching up, with no time for practice or sleep;
your child says plainly that they would rather move.
Stay put when the gap is one or two chapters, or a backlog a weekly plan can clear. And if your child does move, say it at home as what it is: a change of pace, not a judgement.
