Here is what he has to say about it:
The UN Cyber-school Bus - http://cyberschoolbus.un.org/ This is mainly for primary and secondary, but it’s particularly useful for comparing countries (click on ‘country at a glance’) so could be used with lower level general adult classes. You can find out the low-down on any country in the world (UN style) and compare these countries on any particular statistic. Find out what the population density of Brazil is, and compare it with Singapore or get the news from each country via their newspaper websites. There are links to games and some serious UN-type (and GP-type!) topics such as disarmament or famine on the start page.