Expanded Learning Time (ELT) measures have been implemented internationally to reduce the likelihood of academic underachievement among students at risk. The goal of this article is to examine the components of an ELT initiative aimed at supporting students at risk of academic failure in order to optimize the components that can improve its use and organization. Through a mixed method research approach, we have analyzed the experiences of 1,786 5th through 10th graders, 238 teachers and 126 instructors of a city-wide after-school initiative in Spain. This within-group study examines the design of the support, the environment, and the interactions between stakeholders as key components to optimize this support and promote equity. The results show which support components are related to greater support use. The results also suggest understanding these measures as additional support placed within an enriched support network. Implications for practice, research and policy towards this type of initiative are also discussed.