GPCs is the acronym used in relation to phonics. Phonics refers the relationship between speech sounds (phonemes) and their letter representations (graphemes). Therefore the term GPCs stands for grapheme-phoneme correspondences.
Understanding how graphemes match to phonemes is essential in teaching phonics, and for students learning to blend or decode words correctly. GPCs need to be taught in a explicit and systematic manner, which is where a phonics scope and sequence is essential. Students need to learn grapheme-phoneme correspondences to automaticity through repeated teaching and practice.
It is important to note that synthetic phonics is a sound to symbol method. Children must be taught that letters represent the sounds of spoken language and not that the letters of the alphabet each have a sound. (Nevills and Wolfe)
Relevant Related Content
Training 24/7 modules –
Phonics General: Pronounce the Phonemes: https://www.training247.com.au/modules/phonics-general-pronounce-the-phonemes
Phonics 3: Phonics Terminology: https://www.training247.com.au/modules/phonics-3-phonics-terminology
Phonics 2: Defining Synthetic Phonics: https://www.training247.com.au/modules/phonics-2-defining-synthetic-phonics