Labour is pushing for a series of changes to the legislation creating charter schools.
The Education Amendment Bill is heading for its second reading in Parliament next week.
As it stands, publicly funded private schools won't have to employ registered teachers, nor follow the national curriculum or be subject to the scrutiny of the Official Information Act or the Ombudsman.
Labour's amendments reverse all of those proposals.
Education spokesperson Chris Hipkins also wants school zoning rules introduced to the legislation and safeguards for taxpayer investment in charter schools.
He is also seeking a legal guarantee that property developers cannot profit from building early childhood centres on public school land.
Mr Hipkins says that although the changes address some of the major flaws in the bill, they only plaster over what is fundamentally bad legislation.