This is for players aged 17 or under as at the end of the year (31st December) - nearly 100 players from all over the world. Most players are nominated by their National Scrabble Association. However, individual nominations are accepted from countries which have no official organisation. In 2009, WYSC is in Malaysia; in 2010 it will be the Philippines.
This selection comes from an impressive vocabulary program I started playing around with a year or so ago. It's based on a huge dictionary of 150,000 words taken from all the 'big name' vocabulary courses and exams.