ACT leader David Seymour is warning principals they're technically public servants - and must display political neutrality. 

The Associate Education Minister is hitting out at schools who've marked absences by students attending a national  hīkoi as 'justified'. 

Thousands marched through Auckland today on the pilgrimage to Parliament, protesting the Treaty Principles Bill. 

Seymour says parents can only urge schools to do the right thing. 

"Ultimately, it's up to communities to say to principals through their school boards - we don't like what you're doing and maybe it's time to get someone new."

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