What stands behind high grades

between neighbouring classes of the same year in the same subject. Age and curriculum match, average lesson scores do not — the strongest practice is already inside the school, in someone else’s classroom.

discipline rises in the senior years while engagement falls. On a single open lesson, passivity is easy to mistake for order.

of engagement drops trace back to something the school controls — how the lesson is organized and how the teacher talks — not to noise or students chatting.

What is inside

• 13 reasons a class disengages, in order of how often they occur
• Teaching practice compared across primary, middle, and senior school
• Why one format strengthens a lesson in one class and gets in the way in another
• A map of practice by school stage and by classroom situation
• A map of practice by subject group
• Eight rules a school can take straight into its next staff meeting
• Five questions a school cannot answer without data from ordinary lessons

Why the data holds up

• Every connected lesson of the period was analyzed in a row, not a selection of prepared ones
• One scale was applied to lessons across all classes and subjects
• Findings rest on transcripts and specific fragments of the lessons
• Teacher and student data is anonymized
• Every chart states the size of its subsample
• One school is not a norm for a school system: for another school these are hypotheses to test, not conclusions