Are there academic requirements such as trips or other activities that cost money in addition to school fees?
Yes. At least 4 overseas trips per year for Secondary students and residential trips for Year 4 - 6 students. - Jan 2011
At the high school level there is a "week without walls" requirement. For one week, kids must engage in a program outside of the classroom. There are many options, some of which involve community service, and some not. The local options which are inexpensive or free are limited, and the international options can run up to $3900. It makes it hard for kids whose families are not wealthy or whose companies don't cover the cost (especially if they have more than one kid.) It takes place all four years of high school. - Jun 2010