http://www.helium.com/knowledge/27792-the-challenges-of-teaching-english-as-a-foreign-language-in-large-classes.xml Helium.com > Education (Other) > The challenges of teaching English as a foreign language in large classes en-us Copyright Helium.com Mon, 05 May 2008 19:39:55 GMT Mon, 05 May 2008 19:39:55 GMT