English Vocabulary:

Vocabulary | Idioms | Activities | Reference | Etc

Daily word study - Easy: SuperKids School Vocabulary 1, EnglishOnline, Phrasal verb of the day

Daily word study - Advanced: Oxford English Dictionary; Merriam-Webster Dictionary; Wordsmith.Org, SuperKids School Vocabulary 2, SuperKids School Vocabulary 3, Words-R-Us, Merriam-Webster, My word a day

Daily word study: Dictionary.com; Merriam-Webster

University Vocabulary Trainer - an excellent tool for study and review of vocabulary found commonly in university-level textbooks - words are organized into four levels, from most frequent to least frequent. A nice feature is that each word is pronounced in both US and UK English.

Building a Better Vocabulary tutorial

ESL: Vocabulary links

VOCABULARY: an on going process

World-Wide Words usage and meaning notes on unusual words and 'turns of phrase' - fun