ESL- English as a second language
ESOL- English to speakers of other languages

Web sites
http://www.aitech.ac.jp/~iteslj/quizzes/
http://www.manythings.org
http://www.manythings.org/wf/
http://www.eslcafe.com
http://www.rong-chang.om
http://www.englishlearner.com
htp://www.tesol.net/tesl.html