The nature of the literacy assessments valued in the persistent accountability climate within U.S. public education, coupled with an increasingly polarized discourse around what counts as the science of reading (SOR), have resulted in instructional gatekeeping that privileges constrained skill teaching and learning in K-3 settings. The gatekeeper…

Recent educational policy documents have encouraged engaging students in mathematical argumentation via discussion and writing. Most recently in the U.S., the Common Core State Standards recommend that children "construct viable arguments and critique the reasoning of others." One often advocated means of engaging students in this…