From the "Teachers of English as a Second Language List [mailto:TESL-L@CUNYVM.CUNY.EDU".

"What I like about English to Go is that they have complete, integrated lesson plans. You can search their (very extensive) lesson archive for a particular grammatical feature, a topic, level of difficulty, type of exercise (etc). You then get a lesson with an authentic (Reuters news article) reading chosen for its appropriacy, a range of exercises related to the article (and which build on each other within the lesson), a portion of the lesson plan for the teacher (with answers and teaching tips), and often an interactive component (a range of those, as well) for online use."

Are ESL 'pay' sites worth the money? See what they have to say about that in Thailand.