Prime Minister John Key is fending off criticism that he has no mandate for the trial of controversial charter schools - a proposal neither National or Act campaigned on before the election.
The Labour Party and teacher and principal unions have rounded on Mr Key and Act MP John Banks for agreeing to the trial.
The education sector is also concerned it will be shut out of the consultation phase; the implementation group will consist of private sector, community, iwi and Government officials, supported by the Ministry of Education.
NZEI president Ian Leckie called for parliamentary scrutiny of the trial.
"If the Government and Act are so wedded to the idea of charter schools, perhaps they should trial them in Epsom," he said, referring to Mr Banks' electorate.