Proponents argue the separation allows for a tailored instruction and cuts down on gender-driven distractions among boys and girls, such as flirting. But critics decry the movement as promoting harmful gender stereotypes and depriving kids of equal educational opportunities. The ACLU claims many schools offer the classes in a way that conflicts with the U.S. Constitution and Title IX, a federal law banning sex discrimination in education. Researchers also have weighed in.
Diane F. Halpern, a former president of the American Psychological Association, co-authored a review of studies last fall in the journal Science that found research doesn't support the benefits of single-sex education. Additionally, there are lots of problems whenever you segregate people into groups, Halpern said.
"Stereotyping increases so we really do have lots of data that says it's just not supported," she said.
However, proponents have put out their own studies, showing the benefits of separating students. Middleton Heights Elementary cited the research when it first piloted single-sex classes in a few grades. The goal was to address the struggles boys were having in reading.
The idea proved so popular that single-sex classes have expanded throughout the school. Parents can opt out, a choice required by law, if they want their kids in a traditional coed classroom.
In the single-sex classes, teachers use microphones that allow them to electronically adjust the tone of their voice to match the level that research suggests is best for boys. When preparing for a test, the boys may go for a run, or engage in some other activity, while the girls are more likely to do calming exercises, such as yoga.
On a recent tour, Gilbert peeked into a classroom of third grade boys, who had decorated their walls with a camping theme, complete with construction paper campfires and a sign that read "fishing for books."
Next door, the third-grade girls opted for an "under the sea" motif. When they spotted Gilbert in their classroom door way, a few of the girls jumped from their seats and ran to give her a quick embrace.
They learn the same curriculum, they still lunch and play at recess together, but the differences in their learning environments are apparent, from the blue chalkboards in the boy classrooms, to the red paper hearts that decorated the wall of one of the girl's classrooms.