There are many websites that let students to verify how well they are doing with their vocabulary and also to learn more vocabulary. For example, http://www.lexipedia.com , lexipedia is an online visual semantic network with dictionary and thesaurus reference functionality, I have used it before because it is very useful and it not only give the definition of the word we are looking for, but also it provide what category the word is and some synonyms and antonyms.
There is also another page that is very complete, creative and useful, is a fun educational website dedicated to help teacher to build reading, phonics, or English language skills, http://www.vocabulary.co.il is an excellent vocabulary website that offers hundreds of amazing games and activities to teacher vocabulary.
The quote that most cough my attention and that I think it summarize the information I have read is: “Vocabulary is one of those things where the rich get richer.”- Dr. Eli Hinkel (Editorial Board 2009)



