Phonemic awareness is a subset of phonological awareness in which listeners are able to hear, identify and manipulate phonemes, the smallest units of sound that can differentiate meaning. Separating the spoken word "cat" into three distinct phonemes, /k/, /æ/, and /t/, requires phonemic awareness. The National Reading Panel has found that phonemic awareness improves children's word reading and reading comprehension, as well as helping children learn to spellPhonemic awareness is the basis for learning phonics.
Phonemic awareness and phonological awareness are often confused since they are interdependent. Phonemic awareness is the ability to hear and manipulate individual phonemes. Phonological awareness includes this ability, but it also includes the ability to hear and manipulate larger units of sound, such as onsets and rimes and syllables. (source: wikipedia).