BBC English English
- The Sounds Of English: Teaches the sounds of English phonology, provides samples, and gives practice exercises.
- The Features of English: Explains the peculiarities of English phonology that distinguish it from that of other languages.
- Quizzes: Tests the taker’s ability to understand the sounds, phonemic symbols, spelling, and pronunciation of English.
- Programmes: Presents a three-part radio series on pronunciation that the BBC aired in 2005.
Taken together, this site provides an excellent general introduction to accent reduction as well as a lot of excellent sample materials that can be used for reference or in exercises with students.