Play Academy Island
Play Island Academy is game designed to help learners improve their English in a fun way.
An unknown alien life form lands on earth and has to learn English to get by in a range of social situations. You have to progress through different difficulty levels by helping the alien use English in a range of situations.
To see these activities and games in Chrome, enable the Flash Player plugin by default. Instructions here. The activities and games should work in Firefox and Internet Explorer without having to make changes in the configuration of your browser.