The effects of centralising New Zealand's polytechs continue to be felt. 

New data shows there were about 75 thousand international students in the country last year, down from 125 thousand in 2016. 

Tertiary's seen the biggest drop, halving in that timeframe. 

Tertiary Education Union's national secretary Sandra Grey told Mike Hosking polytechs had major reform after Covid, which disrupted courses and staff. 

She says that confuses students looking to study, who will then consider options elsewhere. 

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