The head of one of Hong Kong's most expensive schools has quit and been replaced by a prominent local educator. Felicia Tsang, an academic from the United States, left the $9,000-a- month ISF Academy two weeks ago after the Independent Schools Foundation decided not to renew her contract. 'The board decided that for the future of the school it needed someone with a different background,' said Frances Wong Wai-kwun, the school's supervisor. 'We would like her to have stayed until the end of her contract [in August] to help us with curriculum development, because that was her forte.' It now needed a head who had administrative experience in running a large educational institution or secondary school, Ms Wong added. Education Commission member Dorothy Chan Cheng Mei-chu has taken over as head of the school after being brought in as primary principal in February. Ms Chan was principal of Law Ting Pong Secondary School in Tai Po, which in 2001 won a Quality Education Fund outstanding school award for its management and organisation. The ISF was formed by businessmen and academics to open an exclusive bilingual private school as an alternative to international schools. It has 56 pupils and is due to move to a purpose-built campus in Cyberport in 2006, expanding to cater for 1,800 students.