Concepts
Results and publication
How marks become a result, what a ranking means, and why a published result is a version rather than a live figure.
A result is the product's central claim: it is calculated from the marks and the school's own grading policy, ranked within a scope, and published as something a parent can be shown. This page describes each of those three steps.
A result is derived
Nothing types a final average. The marks are the input, the policy is the rule, and the result is the output. The policy is per subject and per term: which assessments count, what each weighs, the precision a mark is reported at, and the rounding that is applied.
Term result
73.2
(72 x 30 + 64 x 30 + 81 x 40) / 100 = 73.2
Because the arithmetic is stated rather than implied, a result can be recomputed later and it will agree. That is the property an inspector is really asking about when they ask how a grade was arrived at.
The ranking has a scope
A rank is only meaningful inside something. The product ranks within the scope the school defines: a class, a year group, or the whole school. The same student can be third in their class and fortieth in their year, and both are true.
Stating the scope matters because a rank without one is a number a reader will interpret differently from the number next to it.
Publication is a version
Publishing freezes a result set. What a parent is shown is the version that was issued on that date, with the marks as they stood when it was calculated. A later change does not edit it.
That is deliberate, and it is the difference between a published report and a draft: the school can always say what it issued, even after a correction.
A correction after publication
A correction changes the marks and therefore the result the school would publish now. It does not change what was published. Both exist: the issued version, and the current one, and a reader with the right permission can see the difference.
The trail a correction leaves is described on running a term, which is where most corrections actually happen.