This paper reports on the early stages of the conceptualisation and implementation of the Accelerated Inclusive Mathematics-Early Understandings (AIM EU) project, a project whose major goals are to advance theory and practice in the improvement of Foundation to Year 2 (F-2) teachers' capacity to teach mathematics and through this to enhance F-2 Indigenous and low-SES students' levels of engagement and learning of mathematics. A design-research methodology was used to achieve the advancement of theory and practice. The major outcome of the research is a revised theoretical framework to inform the design and implementation of culturally relevant mathematics pedagogy for F-2 Indigenous and low-SES students.