What I don't understand is how they don't run out of talent? If you assume students are at school for 10 years (always), teachers for 30 (some dropout), this p

What I don't understand is how they don't run out of talent? If you assume students are at school for 10 years (always), teachers for 30 (some dropout), this puts the staff:student ratio to 1:36, or 6% of the top graduates (if as stated, top 10%) a year. This is pretty much the lower bound of staff:student in a stable population, it can only get worse with factors such as college drop-outs and top graduates choosing other career paths. So either the demographics are rapidly changing , the numbers or fudged or the majority of top graduates in Finland choose teaching.