“…A recent meta-analysis of 20 experimental and quasiexperimental K-12 classroom studies (Graham & Santangelo, 2014; see also Graham & Hebert, 2010) comparing spelling instruction against no instruction or other learning interventions that did not focus directly on spelling (e.g., Kirk & Gillon, 2009;Ouellette et al, 2013;Rieben et al, 2005) found that spelling instruction was associated with improved reading skills. However, the conclusions of the meta-analytic literature on spelling-focused instruction and reading skills have recently been criticized on methodological and interpretative grounds (for discussion, see Bowers, 2020;Fletcher et al, 2020), which heightens the need for more research to verify the efficacy of such instructional methods. Moderate-to-high correlations of r = 0.5-0.9 between spelling and reading test scores have also been observed across multiple studies (e.g., Ehri, 1987;Townsend, 1947; for discussions see Graham et al, 2002;Rayner et al, 2001;Shankweiler & Lundquist, 1992), indicating potential links between the two skill domains, but a causal relationship cannot be inferred from such data.…”