TABLE OF CONTENTS -- Introduction -- The Achievement Gap, Social Capital and Mobility: An Overview -- Mixed-Methods Research Design -- Test-Score Performance and Rates of Mobility by Socioeconomic and Nativity Status -- Group-Level Differences in the Availability of Social Capital by Socioeconomic and Nativity Status -- Informal Social Networks and the Mobility/ Social Capital Dynamic -- Formal Social Networks: The Mobility/ Social Capital Dynamic and the " Downside" of Social Capital -- Summary of Findings and Recommendations -- REFERENCES -- APPENDICES -- INDEX.