Being male could be included as one of a set of "controversial" new risk indicators used to work out which students receive extra education funding.
Documents released to the Herald reveal details of a proposed "disadvantage index" designed to replace the outdated decile model.
According to a Cabinet paper, the new system could be up to 20 percent more accurate in targeting at-risk students. The proposal is currently under consideration by the Ministry of Education's funding review panel.
Unlike decile ratings, which are drawn the socio-economic characteristics of a school's neighbourhood, the new index would use children's individual characteristics to predict their likelihood of school failure.
The model was built by analysing a real cohort - children born in 1998 - and examining which factors in their lives were correlated with whether or not they achieved NCEA Level 2.
It found five factors were most predictive - the proportion of time the children were supported by benefits since birth; if the child had a CYF notification; their gender (namely, if they were male); their mother's age at their birth; and their father's offending and sentence history.
A range of other factors - including ethnicity and transience - also contributed to a child's risk of underachievement, but were not as strong as those in the first group.
Children were considered at low or high risk on the index due to their full combination of life factors, not because they had one specific factor or not.
In a briefing to educationalists, associate deputy secretary of education Damian Edwards recognised the idea was a sensitive topic.
"All relevant factors have been included in the index including factors that could be more controversial (gender and ethnicity)," Edwards said. "This maximises the predictive accuracy of the index."