Synthetic phonics beats whole-language on every replicated study — the Clackmannanshire cohort showed a 7-month reading advantage by age 7 that grew to 3.5 years by age 11.
2
The debate is settled in policy: England, Australia, and most US states have mandated explicit phonics instruction since 2006–2023.
3
The strongest home support for phonics isn't drilling — it's being read to daily by an adult who occasionally sounds out words and discusses meaning.
Research Data
Reading Achievement at Age 7 by Teaching Method (Months Ahead of Baseline)
Relative reading achievement by teaching method at age 7. Johnston & Watson Clackmannanshire study (7-year longitudinal); NICHD meta-analysis of 1,962 reading studies.
Children taught with synthetic phonics read 7 months ahead of peers by age 7 — and the advantage grew to 3.5 years ahead in reading by age 11 (Johnston & Watson, Clackmannanshire, 7-year study).