Sound Foundations is an ideal introduction to the English phonological system and an invaluable resource, both for teachers of full pronunciation courses and for those who would simply like to improve the quality of their work on pronunciation.
Sounds Foundations also has an award-winning app based on Adrian Underhill's Pronunciation Chart.
The most thorough teacher's guide to phonology available
Contains a description of the phonological system
Creative and practical classroom activities
New and updated edition with Audio CD which contains clearly recorded examples of the sounds described in the book