This paper is based on a randomized controlled trial (RCT) evaluation of a reading programme delivered by older adult volunteers for at-risk early readers. Wizards of Words (WoW) was targeted at socially disadvantaged children in first and second grade experiencing delays in reading but who were not eligible for formal literacy supports. The programme was effective for phonemic awareness, word recognition, phonic knowledge and children's self-beliefs, but was not effective for reading comprehension, vocabulary, spelling or reading accuracy. The programme was most effective for those children starting with 'below average' reading levels and for boys. Programme intensity, school attendance and the child's experience of the programme all predicted response to intervention. Gains in phonemic awareness and phonic knowledge may be explained by the priority given in volunteer training and in programme delivery to the phonics component, and gains in word recognition may be explained by its close association with phonemic awareness and phonic knowledge, as hypothesized by the Simple View of Reading. The findings show that a reading programme delivered by older adult volunteers can have a significant impact on reading skills and self-beliefs of at-risk readers who are not eligible for other formal literacy supports.Wizards of Words (WoW) is a one-to-one reading programme delivered by older adult volunteers for socially disadvantaged children in first and second grade at-risk of reading failure. Volunteers are aged 55 and over, and receive training and ongoing support from two project leaders with professional backgrounds in early education. Although inspired by Experience Corps in the US (Morrow-Howell et al., 2009b;Lee et al., 2011) WoW is an innovative programme designed and delivered by Barnardos in two cities in Ireland. WoW adopts a balanced literacy approach, combining both whole language and phonics strategies, and the WoW logic model posits that socially disadvantaged children at-risk of reading failure should benefit from one-toone support from older adult volunteers who are trained in reading instruction and who also can serve as role models (Barnardos, 2008a).At-risk readers are children having problems with literacy acquisition in first or second grade (i.e., aged 6-to 8-years-old) and who are as a result more likely to experience academic failure, with problems experienced at this stage leading to less frequent reading and further reading delays (Stanovich, 1986). The most efficient and effective methods to address the difficulties of at-risk readers begin with early prevention and intervention (Pullen et al., 2004) and as Elbaum et al.'s (2000)