Despite a premise of the "Higher Education Act of 1965" that no student should be denied an opportunity for postsecondary education due to financial constraints, race- and income-based divides persist decades later. Inequities of early childhood and K-12 experiences, along with differing family and community influences and access to wealth-building structures, contribute to disparate aspirations, expectations, and opportunities among children and families. In the U.S., a "land of opportunity" in which many exalt education as the great equalizer, challenges surrounding access to postsecondary opportunities exacerbate inequities. On average, low- and moderate-income (LMI) students have less access to the academic, social, cultural, human, and financial capital associated with college-going aspirations, expectations, and opportunities than their higher income peers. Children's Savings Accounts (CSAs) have been introduced as a potential tool to expand educational opportunities and boost economic prosperity. CSAs, typically seeded accounts with savings incentives, are asset-building initiatives to encourage saving and foster a college-bound mindset for children and their families. Early research suggests multiple positive effects of CSAs, even before account disbursement and beyond the account balance itself, yet further research is needed to understand how and why CSAs have positive effects. Given the lengthy time horizon of CSAs reaching maturity, stakeholders seek to identify and define interim metrics, such as educational aspirations and outcomes, socioemotional development, postsecondary educational expectations and future orientation, and financial capabilities and well-being to further understand CSAs' impact on individuals and communities. This case study of the Boston Saves program, a CSA initiative that began with a three-year pilot, followed by universal eligibility beginning with $50 seeded accounts for kindergarteners in the 2019-2020 school year, investigates the mechanisms through which CSAs enable interim asset effects for families. This study is informed by asset theory and by Academic Capital Formation theory. The findings demonstrate that parents view Boston Saves as presenting hope and opportunity for their children's future, and they expect Boston Saves to have positive impacts on their families and communities, including through the provision of means for building their financial capabilities. The findings also demonstrate that parents face various barriers to participation in Boston Saves, including accessing information and technology, as well as financial insecurity and lack of follow-through as overwhelmed and often under-resourced parents. Designing and implementing CSAs to expand educational opportunities and boost economic prosperity will require combatting the structural barriers to achieving full participation. Recommendations for Boston Saves and other CSAs include implementing a progressive component such as through providing larger seeded accounts or supplemental grants depending upon income, implementing school-based financial literacy to reach all students, implementing high-touch elements to foster engagement, and developing novel partnerships in the community to expand trust and understanding of the program throughout diverse communities. The findings from this study also have implications for policy, practice, and research of other asset-building initiatives as well as for other approaches to building economic prosperity and mitigating educational inequities. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]