“…The rationale for the CRA sequence is development of conceptual understanding of numbers and operations. Research shows that CRA instruction is effective in teaching complex computation such as addition with regrouping (Bouck, Park, Shurr, Bassette, & Whorley, 2018; Miller & Kaffar, 2011), subtraction with regrouping (Bouck, Chamberlain, & Park, 2017; Flores & Hinton, 2019; Mancl, Miller, & Kennedy, 2012), and algebra (Satsangi, Hammer, & Hogan, 2018; Witzel, 2005; Witzel, Mercer & Miller, 2003). CRA computation interventions included the Strategic Instruction Model (SIM) to assist in developing procedural knowledge, but only after students achieve conceptual understanding.…”