Homelessness and mobility in the context of poverty and economic crisis is an issue of rising local, national, and global concern for many stakeholders, including educators and education leaders. The articles featured in this special issue offer important data and commentary on the significance of homelessness and mobility for school success. This introduction provides a brief overview of the special section, which includes four empirical articles and an integrative commentary. These articles underscore the importance of mobility as well as poverty for achievement disparities and the practical value of integrated data and collaborative research for informing educational practice and policy.