For those who are teaching English to adults and feel that all the worksheets and audio resourses are too childish, here's an advice:
I've found out that the best book to use in adults classes is
The written exercises are very good and the CDs have great listening exercises. The contents are related to our daily life and explore all the vocabulary we REALLY use when we speak English, with friends or at work.
You have different levels, CDs, students book, workbook and teacher's files with answer keys and activities. Honestly, I'm loving it!
There are different ways of getting it. You can do a free download of the students' book, CD1, CD2, Workbook, and Teacher's files.
But don't forget we should buy the real book and respect the author's rights...
Hope you like it!