English as a second language (ESL), English as a foreign language (EFL)
Several sites offer a range of help for ESL/EFL students, including news, links to additional resourses, pronunciation help and forums in which you can ask questions of experts. Dave's ESL Cafe English Club
These online dictionaries can not only help you find the English word you're looking for, but also show you how to use the word correctly. They provide detailed information and examples.