During the summer of 2014, WestEd conducted a study of family engagement and early mathematics learning as part of the Ready To Learn (RTL) initiative with the Corporation for Public Broadcasting (CPB) and the Public Broadcasting Service (PBS). The study was designed to test the effectiveness of a school-based family engagement model in increasing preschoolers' knowledge and skills in mathematics, and in increasing parents' awareness of and ability to support their children's mathematics learning in the home environment. Additionally, the study focused on the feasibility of having teachers from participating schools facilitate parent meetings related to the intervention. The study also examined the relationship of socioeconomic status to learning outcomes and explored how key aspects of the model affect family engagement and learning. Funded by the U.S. Department of Education, the CPB-PBS RTL Initiative has a goal of promoting early learning and school readiness among children ages 2 through 8, with a particular interest in reaching children from low-income families. The Initiative supports the development and delivery of high-quality, age-appropriate, educational content designed to increase the early literacy and mathematics competencies of young children. The family engagement model was developed over the past three years, and earlier versions were tested in two previous studies (McCarthy, Li, & Tiu, 2012; McCarthy, Li, Atienza, Sexton, & Tiu, 2013). The latest study builds on these past two studies by developing a scalable model that can be implemented in different preschool locations and by assessing the feasibility of having local preschool staff facilitate its weekly parent meetings. (author abstract)