Oh wonderful. Most outlets have ignored the actual, full info in this case. The real issue stems that a bag is being brought into the classroom, which regardless of what it is (backpack, purse, etc.) is not allowed in the classrooms at this school, regardless if the carrier is male or female. They want students to store the bags, purses, etc. in lockers during class. My junior high school had the same policy, I think they used the reasoning of tripping, and/or fire hazards.
This has been given a really, really unfortunate angle, and it has nothing to do with what most think it does. The student is not suspended for wearing a purse, but rather, bringing a purse into the classroom to hold materials, against school policy (which I think is a rather silly rule, but it gives this case a much different perspective). Even if this child was a girl, she still would wind up in trouble for this. Yes, it is still 'wearing', but classroom only. Lazy journalism.