Dave Sperling's web site with quizzes from other EFL and ESL instructors for Geography, Grammar, History, Idioms, Slang, & Words, People, Reading Comprehension, Science, World Culture, and Writing.
This is a site designed to get kids around the world to talk to each other. Students can access the site in a variety of languages. The site frequently offers special projects and features.
CultureGrams series is one of the most trusted and widely used cultural reference and curriculum products in the education, government, and non-profit arenas.