A decade ago, a second-grade student made a bold statement. The student passed out notes to classmates reading, in scribbled crayon, "I am a boy" and "I am not a gril. [sic]" Now a high school ...

Imagine a sea of shouting girls dressed in handmade paper costumes, standing in a clumped circle and being led in cheer by a class mascot on a referee stand. Silly, right? Some may even have a ...