Here you have some links to practice the phonetic symbols!
Listen and repeat each symbol many times, then do the same with the words.

REMEMBER: Listen and repeat until you catch the Englishness of the sound.
http://www.oupchina.com.hk/dict/phonetic/home.html
http://www.stuff.co.uk/calcul_nd.htm
http://www.teachingenglish.org.uk/try/activities/phonemic-chart

Try this quizz. Click on NEXT to continue working with the other exercises:
http://www.bbc.co.uk/worldservice/learningenglish/grammar/pron/quiz/quiz1/index.shtml
http://www.bbc.co.uk/worldservice/learningenglish/grammar/pron/quiz/quiz2/
http://www.bbc.co.uk/worldservice/learningenglish/grammar/pron/quiz/quiz3/
http://www.bbc.co.uk/worldservice/learningenglish/grammar/pron/quiz/quiz4/
http://www.bbc.co.uk/worldservice/learningenglish/grammar/pron/quiz/quiz5/


Match the phonemes with the vowel sound in the first syllable of the words:
http://www.btinternet.com/~ted.power/phon02.htm

RP English Vowels
http://www.phon.ucl.ac.uk/home/johnm/flash/rpvkey.htm

TRANSCRIPTION EXERCISES
http://davidbrett.uniss.it/phonology/transcription%20exercises/index_of_transcription_exercises.htm

Watch these videos and practice:

The sounds of English
The sounds of English-Chart
Vowel sound 1
Vowel sound 2
Vowel sound 3
Vowel sound 4
Vowel sound 5
Vowel sound 6
Vowel sound 7
Vowel sound 8
Vowel sound 9
Vowel Sound 10
Vowel Sound 11
Vowel Sound 12
Vowel Sound 13
Vowel Sound 14
Vowel Sound 15
Vowel Sound 16
Vowel Sound 17
Vowel Sound 18
Vowel Sound 19
Consonant Sound 1
Consonant Sound 2
Consonant Sound 3
Consonant Sound 4
Consonant Sound 5