TY - JOUR AU - Molina González, Marta AU - Mason, John PY - 2009 SN - 1492-6156 SN - 1942-4051 UR - http://hdl.handle.net/10481/23912 AB - Student responses to arithmetical questions that can be solved by using arithmetical structure can serve to reveal the extent and nature of relational, as opposed to computational thinking. Here, student responses to probes which require them to... LA - eng PB - Taylor and Francis KW - Forms of attention KW - Number sentences KW - Relational thinking TI - Justifications-on-demand as a device to promote shifts of attention associated with relational thinking in elementary arithmetic ER -