Accuracy
A maths problem has the right answer; a stated fact is sourced. If the working is wrong, it goes back — a wrong answer printed at scale is a wrong answer taught at scale.
Age fit
The difficulty of a lesson matches the grade it claims. Content pitched too high or too low for the section it names is sent back to be re-pitched.
Register
The language fits the setting — formal content reads as formal, and Hindi terms are accurate, not transliterated guesses. Style guides in both languages keep the voice consistent.
Originality
Submissions are screened for copied work. Recycled questions and lifted passages are caught before they go live; the writer is told plainly and given a path to revise.
Claims
If a course says it covers most of a board exam, that claim is checked against the syllabus. A promise to a student preparing for an exam has to be one the content can keep.
Re-review
When a board changes its syllabus, the affected content is reviewed again. Material that was right last year is checked against this year's spec, so nothing quietly goes stale.