Marks Predict Less Than You Think
In 1921 the Stanford psychologist Lewis Terman selected around 1,500 Californian schoolchildren with exceptionally high measured intelligence and began following them. He expected to demonstrate that measured ability predicts eminence. The study outlived him and is still running.
His subjects did well. They were healthier and more successful than average, and many had substantial careers. But the group produced no Nobel laureate. Meanwhile two boys tested and rejected as insufficiently gifted - William Shockley and Luis Alvarez - each went on to win one.
The measurement was not worthless. It was simply much weaker than the confidence placed in it.
What this is not saying
It is not the comfortable claim that marks do not matter. In India they matter enormously and pretending otherwise would be dishonest. A percentage determines which colleges are available, which courses open, and sometimes whether a family's money stretches far enough. Nobody in a Class 12 household needs to be told to relax about it.
The narrower and more useful claim is this: a mark is an excellent measure of how well a student performed a specific task on a specific morning, and a poor measure of what they will be able to do at thirty. Those are different questions and we routinely treat one as an answer to the other.
What the measurement misses
An exam tests recall and application under time pressure against a fixed syllabus. It cannot test whether a student can choose a good question, work without instruction, change their mind when shown better evidence, or keep going at something after the assessment ends. Those are precisely the abilities that decide a career, and none of them fit in a three-hour paper.
This is not a flaw anyone can fix. An exam has to be standardised to be fair, and standardisation is exactly what excludes the unmeasurable. The mistake is not the exam. It is concluding that what the exam leaves out does not exist.
What a parent can actually do
Prepare hard for the exam. It is the gate and it is real. This advice is not in tension with anything else here.
Keep one thing alive that nobody is grading. One project, one subject, one long-running curiosity. It costs a few hours a month and it is the part that compounds.
Be careful what you praise. Praise for the mark teaches that the mark was the point. Interest in the reasoning teaches something more durable.
Separate the result from the child on results day. They will remember how that afternoon was handled for a very long time.
Terman's children were, by the only measure he trusted, the most promising in California. What the following century showed is that promise is a poor forecast and persistence is a better one - and persistence is the one thing on that list a family can actually influence.
The capacity to keep learning once nobody is grading you is what we mean by learnacy. The Learnacy programme runs alongside school across a year, and shorter options are on Upcoming Programs.