The pressure will go on the Maori Party this week to change its mind and vote down legislation introducing charter schools to New Zealand.
The party's three MPs have the deciding vote on the controversial move.
The second reading of the bill is expected before Parliament this week.
Labour MP Chris Hipkins plans to meet with the party this week in a bid to convince them to oppose the bill, or at the very least, support some of his planned amendments to it.
"We obviously respect that their desire to improve Maori educational outcomes is a genuine one. We support them in that goal.
"We'll be pointing out for them why we think charter schools won't achieve that, and hopefully we'd love to get them opposing charter schools."
Among the changes Chris Hipkins proposes is a requirement to make all charter school teachers qualified and registered.
Photo: Maori Party co-leader Pita Sharples (Getty Images)