They are Badihagwa, Gerehu, Jubilee, Marianville, Port Moresby International School and newcomers Koiari Park High School.
Previously known as the IBS School Debate, the Emstret Tokaut Debate Challenge is scheduled from August 29 to September 1.
The challenge also includes schools from other provinces and comprises three competition categories, Provincial, National and Melanesian.
The schools will battle it out for the three days and the overall winner, the provincial champions, will represent their regions in the National Championships.
