Boys and girls are not frogs.

Certain frogs and other such critters are able to change from male to female (and vice versa) when the local population has an oversupply of one or the other. This helps to maintain a balance between the genders, and maximizes the community's potential for reproduction.

Somebody apparently needs to tell the Fairfax County, Virginia Board of Education that human sexuality doesn't work that way. They seem to be confused about this.