The Kampang school's initiative, far from stirring up controversy, has instead prompted a discussion in other schools over whether they should be providing the same facilities.
Kampang is proud of its toilets. Spotless, and surrounded by flowering tropical plants, they have won national awards for cleanliness. But there is something else about them too. Between the girls' toilet and the boys', there is one signposted with a half-man, half-woman figure in blue and red.
The headteacher, Sitisak Sumontha, estimates that in any year between 10% and 20% of his boys consider themselves to be transgender - boys who would rather be girls. So the school offered to build the transgender boys their own facility, and they welcomed it.