New U.S. Rules Boost Single-Sex Schooling

Title IX regulations are amended to provide schools more latitude.

Ninth graders at Booker T. Washington High School in Memphis, Tenn., flow through school doors together each morning, but when they head to class, they’re separated by gender.

This year, the school is experimenting to learn whether educating its 9th graders—who as a class had high dropout rates and discipline problems stemming from interaction between boys and girls—in single-sex classrooms can boost their success.

Last week, public schools across the country were given the green light by the federal government to try the same...