The Gender Gap in GPA: Why Women Outscore Men by 0.19 Points

What Research Says About Why the Gap Exists

Factor 1: Noncognitive Skills and Conscientiousness

Educational psychologists identify a personality trait called “conscientiousness,” which refers to the tendency to be organized, responsible, persistent, and goal-directed. Research consistently shows:

Girls score higher on conscientiousness measures from elementary school onward. This manifests as:

• Better organization (keeping track of assignments, due dates, materials)
• More consistent homework completion
• Better attendance and punctuality
• Greater attention to detail in assignments
• More consistent study habits

Boys score lower on average on these same measures. This shows up as:

• More forgotten assignments and materials
• Inconsistent homework completion
• Higher rates of late or missing work
• More disorganization with papers and notes

A 2019 study by researchers at the University of Georgia found that noncognitive skills (particularly conscientiousness and self-discipline) explained approximately 55% of the gender gap in GPA. When researchers statistically controlled for these traits, the GPA gap nearly disappeared.

The study did not find differences in intelligence. Males and females scored equally on cognitive ability tests. The difference was in behaviors, such as how consistently students completed work, followed instructions, and maintained organization.

Factor 2: Classroom Behavior and Noncognitive Grading

Elementary and secondary school grades aren’t purely based on test performance. Teachers also grade:

• Homework completion
• Class participation
• Behavior and attentiveness
• Neatness and presentation
• Following directions

Female students, on average, receive higher marks on these “noncognitive” components:

Participation: Girls participate more frequently in class discussions in elementary and middle school (though this pattern reverses in some STEM courses in high school).

Behavior: Boys receive disciplinary referrals at a rate 3-4 times that of girls. Disruptive behavior affects grades through participation scores and teacher perception.

Homework completion: Girls complete homework at higher rates. A study tracking 20,000 students found girls turned in 89% of assignments compared to 83% for boys.

Presentation: When assignments are graded on neatness, formatting, and presentation alongside content, girls score higher on these components.

Critics argue this means schools are “grading for compliance” rather than learning, and that grading systems favor traditionally feminine traits (organization, compliance, neatness) over masculine traits (risk-taking, independence, creativity). Supporters counter that the organization and following directions are legitimate academic skills.

Either way, the current grading system rewards behaviors that girls demonstrate more consistently.

Factor 3: Reading and Verbal Skill Development

Girls develop reading and verbal skills earlier than boys, on average. This early advantage compounds:

Reading proficiency by 3rd grade:

• Girls reading at grade level: 39%
• Boys reading at grade level: 31%

Reading scores by 8th grade:

• Girls score 10 points higher on average on NAEP reading assessments

Writing skills:

• Girls consistently outscore boys on writing assessments at all grade levels
• The gap is largest in narrative and persuasive writing

Since most courses involve significant reading and writing (even math and science courses require reading comprehension for word problems and writing for explanations), early literacy advantages create cumulative benefits throughout K-12 education.

Why do girls develop these skills earlier? Research points to a mix of biological and social factors:

Biological: Girls’ brains develop language centers slightly earlier. Girls typically begin speaking earlier and develop fine motor skills (needed for writing) earlier than boys.

Social: Girls are read to more frequently as young children in many households. Girls spend more time reading for pleasure. Girls are encouraged toward verbal activities, while boys are encouraged toward physical activities.

Both factors likely contribute.

Factor 4: Developmental Timing and Maturity

Adolescent brain development follows different timelines in males and females. The prefrontal cortex, responsible for planning, impulse control, and judgment, develops earlier in females.

Brain maturation:

• Female brains reach peak maturity around age 21
• Male brains reach peak maturity around age 25

During the high school years (ages 14-18), females are further along in prefrontal cortex development. This translates to:

• Better impulse control (less likely to skip assignments for immediate gratification)
• Stronger executive function (planning, organizing, following through)
• More future-oriented thinking (seeing the connection between today’s work and future goals)

This developmental difference is temporary. By the late 20s, males catch up. But K-12 grades are earned during the years when this gap is most pronounced.

Factor 5: Academic Priorities and Social Pressures

Research on adolescent social dynamics reveals different peer pressures:

For girls, academic achievement is socially acceptable or encouraged by peers. High-performing girls can be popular. There’s less social penalty for being seen as studious.

For boys, depending on social context, academic achievement can be seen as “uncool” or “nerdy” by peers. Boys face more social pressure to downplay academic effort and appear effortlessly capable rather than hardworking.

A 2018 study found that boys were significantly more likely to:

• Underreport time spent studying
• Claim work was “easy” even when it required effort
• Avoid appearing too academically focused
• Skip homework rather than seek help when struggling

These social dynamics vary by school culture, but they are documented across diverse settings. The result: some academically capable boys underperform relative to their ability because of peer pressure that does not affect girls as strongly.

Factor 6: Response to Feedback and Help-Seeking

How students respond when they struggle differs by gender:

Girls are more likely to:

• Ask teachers for help or clarification
• Seek tutoring or extra support
• Form study groups
• Email teachers about assignments
• Attend office hours or study sessions

Boys are more likely to:

• Avoid asking for help (viewing it as weakness)
• Struggle alone rather than seek support
• Skip confusing assignments rather than ask for clarification
• Miss opportunities for extra credit or revision

This is not universal; plenty of boys seek help, and plenty of girls do not, but the aggregate difference is measurable. When students struggle, help-seeking behavior strongly predicts whether they recover or fall behind. Girls’ higher rates of help-seeking contribute to better outcomes.

Factor 7: Teacher Bias and Expectations

Some research suggests implicit teacher bias plays a role:

Studies on grading: When teachers grade assignments blind (without knowing student names), the gender gap in writing scores narrows but does not disappear. This suggests grading includes both real performance differences and some degree of bias.

Behavioral expectations: Teachers report higher behavioral expectations for girls and express more frustration when boys do not meet organizational or behavioral standards. This could become a self-fulfilling prophecy.

STEM courses: In math and science courses, some studies find that teachers provide more encouragement and higher-level questions to boys, while directing more procedural questions to girls. This could explain why the GPA gap nearly disappears in math despite girls outperforming boys in most other subjects.

Teacher bias likely contributes to the gap, but research suggests it is a smaller factor than behavioral and developmental differences.