Leader David Cunliffe will deliver his keynote speech at about 1.30pm, and is expected to set out new education policy to reduce class sizes by employing new teachers.
It would be paid for partly by the $359 million National has allocated for its scheme to reward good teachers and principals by paying them more and using them to work with other teachers and schools.
Labour will also set up an Advisory Service to identify good teachers and take them out of their classrooms for up to 2 years to work with other teachers and in other schools.
It will also raise the threshold for teacher entry and set up a Leadership College to develop standards for aspiring principals.
Australia's Labor Party leader Bill Shorten will also address the Congress today.
Labour MP Grant Robertson kicked off the Congress with a roundup of jokes, mainly aimed at Labour's National rivals. National had its conference at the same venue, the Michael Fowler Centre, last week and Mr Robertson said Labour had fumigated since the "Key Fest."
He told delegates if they looked under their seats they might find some leftover fliers about a National Party fundraiser: a movie screening featuring Judith Collins in "Don't Cry for me Oravida."He then introduced Ms Coatsworth as Labour's own 'Coromandel Gold,' "but without the nasty after effects."