Phonics is a method of teaching people to read and spell (and therefore write) in an alphabetic writing system by associating symbols (letters/graphemes) with sounds (phonemes). The place of phonics in teaching children to read and spell is vigorously debated among researchers, often spilling over into the popular press. Advocates of principally comprehension-based (e.g., whole language) teaching have maintained that little or no phonics instruction is needed; others are of the view that it is essential and must be systematic. Analysis of the most rigorous evidence from research reviews and meta-analyses suggests that systematic phonics teaching is effective for teaching children to read and spell in English, and that the combination of systematic phonics teaching and comprehension-based approaches is probably more effective than either alone. Research has therefore begun on integrated teaching of literacy that incorporates both code and meaning emphases, but currently the requisite professional knowledge and teacher capacity are challenges for many school systems.
The principal forms of phonics teaching are synthetic, where children are taught to sound out the letters of a word and to blend (synthesize) the sounds together to form a word; and analytic, in which sounding-out is not taught to start with, but children identify the phonic element from a set of words in which each word contains the element under study, for example, pat, park, push, and pen. There is not yet sufficient convincing research evidence to decide which of these is more effective. Systematic phonics teaching in general is effective across the primary age range, for normally developing and most at-risk children, and probably for children whose first language is not English; and its effects last, at least in the crucial early years. Nonetheless, government policy and reform interventions in this area are sometimes heavy-handed, frequently influenced by political and community pressure, and may face difficulties of scale, resources, and implementation that hamper their effectiveness and generalizability across school systems. A new, large systematic review may be needed to clarify various outstanding issues.