[The content of this article has been produced by our advertising partner.]Kellett, the British International School in Hong Kong, turns 50 this year and they have much to celebrate. Half a century from their humble beginnings as two primary classes in Wan Chai, they are now a through school across three campuses, with over 1600 students and a global reputation for excellence. This growth in itself is remarkable, but what is more remarkable is how true the school has stayed to the values on...