BRISBANE, April 17 - Mitchelton State High School has been using the "Genderbread Person" resource as part of its health studies curriculum.
The resource, which features a gingerbread figure as a mascot, teaches students about current theories of gender as not just divided into "man" and "woman" but having several variations.
It also teaches the difference between biological sex and gender identity.
"Gender is one of those things everyone thinks they understand, but most people don't," the resource says.
"It's not either/or. In many cases, it's both/and. A bit of this, a dash of that."
Some parents have reportedly complained about the content of the material, according to The Courier Mail on Tuesday.
But a department spokesperson said Mitchelton High parents were given the choice to opt their children out of studying that curriculum at the start of term.
"Mitchelton State High School uses the Genderbread Person resource as one small component of Resilient Individuals who Strive for Excellence (RISE), a program that focuses on student wellbeing, including social and emotional learning," the spokesperson said in a statement.
"Programs like this assist schools in cultivating a supportive and inclusive culture for students."
The department gives individual schools leeway to decide what resources are used to teach students about gender identity, but didn't keep information about which resources were being used, or whether the Genderbread Person was being taught at any other schools in Queensland.
The material was previously used in some NSW schools, however, it was scrapped along with other materials when that state banned teaching gender theory in high schools in 2017.