SUMMARY
The acquisition of [ ?: ] and [ o? ] vowel sounds of the English language constitutes a serious problem for Turkish learners of English. There are no pedagogically-developed specific materials or sample lesson plans in the literature to remedy the pronunciation difficulty brought about by [?:] and [o?] vowel sounds of the English language. Therefore, this article aims at providing Turkish learners of English with pronunciation teaching material and a sample lesson on two problem causing sounds like [?:] and [o?] by using the audio-articulation method developed by Demirezen (2003, 2004).