http://www.engvid.com/ Learn the difference in pronunciation between A and O vowel sounds in English. Hear the difference between words like cat, sack, and caps, and words like cot, sock, and cops. If you know the International Phonetic Alphabet, the sounds I’ll be teaching in this lesson are æ and ɑ. If you don’t know the IPA, don’t worry! http://www.engvid.com/pronunciation-a-o/