In her OFSTED blog post, 'Supporting secondary school pupils who are behind with reading', HMI Gill Jones writes:
"(Secondary) pupils who can’t read unfamiliar words accurately will need phonics teaching. Regardless of age, special educational need or background, the same knowledge of the alphabetic code and phonics skills underpins all reading. Intensive practice should soon make sure that pupils can read age-appropriate texts accurately and automatically."
That Reading Thing is truly age-appropriate phonics for secondary, adult and transition to secondary school and will help you identify and fill phonics gaps quickly.