BBC.co.uk: Information (with audio segment) about features of
English pronunciation: the schwa sound, the most common sound in English. It is a weak, unstressed sound and it
occurs in many words. It is often the sound in grammar words such as
articles and prepositions.
English OnLine France: EFL / ESL Prononciation exercises:
Stress and Schwa. Limericks: original pronunciation exercises on stressed
syllables and the schwa sound for EFL / ESL students. Contains audio files.
Karen’s Linguistic Issues: An interesting list of expressions (reduced forms) commonly pronounced in a relaxed way in American English. Also includes explanation of the importance of the schwa sound in relaxed pronunciation. List was compiled by Karen Bond.