Phonetics is the study of speech sounds. It is a branch of linguistics that focuses on the production and classification of these sounds.
Here are some websites and videos to help you with the pronunciation of English words.
Good for Primary and Secondary School learners
From this web you can download an interactive Phonemic Chart
English Pronunciation Training
Pronunciation Practice: Difficult Vowel Sounds (Diphthongs)
Silent Letters
Learn Phonetics - International Phonetic Alphabet (IPA)
Pronunciation of "ed"
"ed" Past Tense Pronunciation
Phonetic Chart Explained
Single Vowel Sounds
Diphthong Sounds
More videos from English Language Club here
An online application that transcribes small English texts
This IPA keyboard allows you to type pronunciations of English words as they appear in English dictionaries.