The Waitangi Tribunal in Wellington will hear from the Teachers Council - the regulatory body for registered teachers - on Tuesday.
Director Peter Lind is a witness of the Crown, which is this week presenting evidence to the inquiry into the running of Maori language pre-schools.
Te Kohanga Reo National Trust has brought a claim in which it is seeking self-management.
Monday lawyers for the Crown told the Tribunal the Trust is not a Treaty partner and is not a taonga that requires protection under the Treaty of Waitangi.
The Crown will continue to give evidence until the end of the week.
