Pupil-trained-teacher ratio, primary education
Average number of pupils per trained teacher (a teacher who has received the minimum organised pedagogical teacher training pre- or in-service required for teaching at the primary level) in primary education.
Nothing has been ingested yet for Pupil-trained-teacher ratio, primary education in World. Rather than estimate it, here is what the semantic layer already knows about the indicator itself.
Coverage below is what is currently curated for this indicator (any geography); it will fill in as more sources are crosswalked.
Caveats
Ratio to *trained* teachers specifically (UIS also publishes a pupil-to-qualified-teacher variant, PTRHC.1.QUALIFIED, not curated here), so it is more sensitive to teacher-training-policy changes than a plain headcount pupil-teacher ratio would be. Nepal's early values are genuinely extreme (over 260 pupils per trained teacher around 2000-2002, reflecting how few teachers then held formal training) and fall to a much more typical ~18-24 by the 2020s as training coverage expanded -- the wide plausible_range is intentional, not a data-quality hedge.