While letters remain the same, sound comes in different units: syllables, onsets and rimes and phonemes. Each syllable is made up of an onset, a rime or a combination of both. An onset is any consonants presented before a vowel in a syllable. For example, in the word “star” /st/ is the onset. Conversely a rime is any vowel and consonant(s ) following an onset. In “star”/ar/ is the rime. Phonemes are the small units of sound that make up a word. While “star” consists of only one syllable, it contains four different phonemes:/s/ /t/ /a/ /r/.