And the Kids?
It's a toss up as to what kids think about the situation. Those girls or boys who already attend classes in an all-girl or all-boy school love it, hate it, or don't really care. The same can be said for those in a coed classroom. A lot has to do with personality and preferences. It has been shown though, in a majority of cases that grades and test scores go up without members of the opposite sex around.
Teachers are able to treat and teach girls the way they learn best, and likewise for the boys. Many students respond to this, but for others, having to do without someone interesting to look at during class makes them cringe. Unfortunately, kids get little say in this sort of thing, and single sex schools or classrooms may be coming to your school as soon as next year are you ready?