The project's focus was to learn more about the ways to best assess and support the development of numeracy in the early grades. Project goals include involving teachers and researchers in: (1) the creation and use of performance-based tasks most appropriate for assessing numeracy in young learners; (2) the development and refinement of instructional strategies to support numeracy in school and at home; and (3) the development of reference standards on key assessment items that provide a portrait of young students' mathematical thinking. [For complete proceedings, see ED489538.]