The qualitative interview data were transcribed verbatim and analyzed individually by three research team members. Each researcher reviewed and coded the transcripts to 245 identify the specific resources activated as students constructed the RCDs de novo and the resources activated when the multiple-choice items were provided. Resources were coded based on explicit statements from students -if it was not explicitly stated, the resource was coded as not activated. The three researchers analyzed the constructed RCDs from the resources activated to evaluate whether the resources were productively applied into an RCD 250 feature. Four codes emerged from the discussions: (1.) activated and productively applied , (2.) activated and not productively applied, (3.) not activated, and (4.) activated once the multiple-choice options were provided. Activated and productively applied denotes scenarios where the resource was activated and represented accurately in the RCD. This is linked to the selection of the resources and RC frameworks. Activation of the resource represents part 255 of the challenge, with the second requiring accurate representation in an RCD. Activated and not productively applied denotes scenarios in which resources were activated but not productively applied in constructing the RCD. The researchers met and discussed each coding scheme until reaching an agreement on the final codes reported in the manuscript.