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It usually starts small. "Your brother always had neat handwriting." "Your didi was my best student." When two children share a school, often with the same teachers a few years apart, comparisons come easily. Most teachers mean no harm. But a child who hears it every week can start to believe they are the "less" one, and the sibling held up as the example feels the pressure too.
Why do teachers compare siblings in the same school?
Teachers remember students, and a younger sibling arrives with a ready-made reference point: same surname, same family, often the same teacher.
In a 1983 paper in the Journal of Learning Disabilities, Linda Richey and James Ysseldyke reported two studies of US teachers, including one in which teachers rated students whose older sibling they had taught before. In both, teachers expected less of the younger siblings of students labelled learning disabled than of other younger siblings. The authors warned that the label may taint teachers' expectations of that student's siblings.
It cuts both ways. A star older sibling can give the younger one a high bar they never chose to aim for.
Does a teacher's comparison actually affect my child?
Keep this in proportion. A 2005 review of 35 years of research in Personality and Social Psychology Review by Lee Jussim and Kent Harber concluded that teacher expectations can become self-fulfilling, but these effects are typically small, do not build up much over time, and may be more likely to fade than to grow. One comment will not decide your child's future.
The bigger risk is what the comparison teaches the children about themselves. A 2015 study in the Journal of Family Psychology by Alexander Jensen and Susan McHale followed 388 US families over three yearly rounds. When parents rated one sibling as more academically able, that child tended to earn relatively higher grades the following year. The same study found that a child with better grades than their sibling reported relatively stronger interest in school the next year. So "the clever one" and "the other one" can turn into roles the children grow into, which is why the talk at home matters as much as the one at school.
How do I talk to the teacher without making it worse?
Go privately, go early, and talk about your child, not the teacher's character. A short meeting or polite note beats a complaint in the class WhatsApp group.
A script you can adapt:
Open with something real. "Aarav really enjoys your science lessons."
Describe what happened, not a motive. "He has told me a few times that he hears 'your sister never did this'. He has started to say he is the weaker one."
Make one clear request. "Could you give him feedback on his own work, without reference to his sister? He responds well when he knows exactly what to fix."
Offer help. "If there is something he is struggling with, please tell me and we will work on it at home."
Most teachers stop once it is pointed out. If it carries on or becomes public remarks in class, take it to the coordinator. Our guide to what to do when a teacher favours other students covers that step.
What should I say to each child?
Talk to them separately. Each child needs a different message.
To the child who is compared unfavourably:
"Your teacher's comment was about her memory of your sister. It says nothing about what you can do."
"You are not in a race with your sister. The only person I compare you with is you, last term."
"Which part of the work was actually hard? Let's look at that."
The last line turns a hurt feeling into a task. If the gap is real, say in fractions or chemical bonding, fix it on its own terms. Fermi's AI tutor works out what a student already knows and builds a plan for the session, so the work starts from where your child is, not from where a sibling was.
To the child held up as the example:
"You don't have to keep winning for your brother to be okay."
"Please don't repeat the teacher's comparison at home."
Then check your own language. If "why can't you be like your sister" comes up at home too, our piece on why comparing siblings backfires, and what to say instead has replacements. If the younger one is pulling ahead, see when a younger sibling scores better than the elder.
When is it more than a teacher's comment?
Watch for a child who no longer wants to go to school, says they are "useless", stops eating or sleeping well, or seems low for more than a couple of weeks. These are signs to talk to the school counsellor or your family doctor. In India, the government's Tele MANAS helpline, 14416, is toll-free, open 24/7 and lets callers choose their language.
