English Vocabulary Builder - Beginning, Intermediate and Advanced

http://esl.about.com/od/engilshvocabulary/English
_Vocabulary_Builder_Beginning_Intermediate_and_Advanced.htm

English Vocabulary Building help for students

Strengths
This site contains

http://esl.about.com/od/vocabularyreference/English_Vocabulary
_Reference_Sheets_for_Building_English_Vocabulary.htm

English Vocabulary Reference Sheets for Building English Vocabulary: pages with specialized vocabulary lists: Book-keeping and Financial Organization, English for Legal Purposes, Expressing number in English, among many others.

http://esl.about.com/od/vocabularyadvanced/Vocabulary_for
_Advanced_Level_English_Learners.htm

Vocabulary for Advanced Level English Learners: pages with information sheets linked to quizzes.

Weaknesses
T here are no exercises or quizzes to go with the Reference Lists, so you need to find a way of learning the vocabulary that is so helpfully grouped for you.

Beware!
This is a large site and it is easy to get lost while browsing. There are advertisements, which look like parts of the page, as they are in the same colours – be careful not to click on them.