In school we follow 'Letters and Sounds Phases' when teaching phonics. Our teaching of phonics is supported by the use of 'Jolly Phonics' and 'Phonics Play'. For older children who need additional phonics teaching or intervention we use the 'CLLD' materials. When introducing each phoneme (unit of sound) we teach the grapheme (the letter/s that represent the phoneme) in a joined font. 
The clip below is really helpful if you are unsure how to articulate each phoneme.