Reading, writing, arithmetic - and, now, carbon offsets.
A local conservation group is planning to launch a unique pilot programme to teach Hong Kong children about 'cap and trade', an economic concept more familiar to environmentalists, policy wonks and politicians than five-to-18-year-olds.
Governments have been considering cap-and-trade programmes for years as a way to battle pollution, and the European Union has implemented a greenhouse-gas emission trading system.
But George Woodman, director of the Teng Hoi Conservation Organisation, said his non-governmental organisation would like hundreds of Hong Kong children, starting in September, to understand and benefit from the environmentally friendly concept - an idea he admits is alien to many people.
'If I talk to the guy in the street, he doesn't know what I'm talking about,' Mr Woodman said. 'But we're talking about something of global significance.
'How do you make that into something people understand? You actually get them doing it.'