The prime minister is expected to sit down with Sydney Archbishop Anthony Fisher, Australian Catholic Bishops Conference president and Brisbane Archbishop Mark Coleridge and the incoming Archbishop of Melbourne, Peter Comensoli, in Sydney on Thursday.

Catholic educators are concerned non-government schools are starting term three with no idea about how much funding they would receive from the Turnbull government in 2019.

Education Minister Simon Birmingham has promised all school sectors would enjoy "absolute certainty" of funds in the future.

The minister is consulting with the sector on a new funding model following a report released by the National School Resourcing Board two weeks ago into socio-economic status (SES) scores.

SES scores allow governments to provide the greatest support to those non-government school communities which have the least capacity to contribute to their school fees.

The board has recommended moving from a SES score based on Census districts to assess family income, occupation and educational status, to a more direct measure of family income.

At the same time, the Australian Charities and Not-for-Profits Commission is reviewing the charitable status of Catholic Education Melbourne over claims it engaged in political activities, such as robocalls and leaflet drops, during the Batman by-election.

The archbishops are also expected to raise concerns about possible laws to force the disclosure of information provided in the confessional, following a recommendation from the royal commission into institutional responses to child sexual abuse.

Australian Associated Press