The recently released and updated Pre-Kâ12 Guidelines for Assessment and Instruction in Statistics Education (GAISE II; Bargagliotti et al., 2020) provides guidance as to how teachers can support the development of data literacy for all students in the pre-Kâ12 curriculum. However, to truly meet the vision of the GAISE II report and to support all students in developing data literacy for todayâs societies, significant transformations need to be made to the educational system as a whole to build capacity for such development. In this article we discuss the current state of the Kâ12 curriculum focusing on the mathematics curriculum where statistics and data concepts are most frequently situated, presenting some challenges and exciting examples. We then discuss areas of need for capacity building that must come at all levels, including: Kâ12 school curriculum, Kâ12 teacher professional development, Kâ12 teacher preparation, statistics and data science education research, and policies. We also provide a set of recommendations for building capacity to develop the data literacy of all students through the teaching of data science and statistics concepts and practices in the Kâ12 mathematics curriculum to support democratic equity through engaged citizenship.