Student mental health needs continue to rise across the United States and many students and families rely on schools to provide services to meet these needs. Yet, an overwhelming number of available frameworks and approaches to school mental health (SMH) and overlapping terminology surrounding SMH supports like trauma-informed (TI) approaches, social and emotional learning (SEL), and others can lead to confusion and potentially less effective implementation of services and supports for students. In this paper, we aim to mitigate this confusion and offer a solution that integrates several of these approaches into a single complementary model with a special emphasis on the role of SEL. We first present an overview of commonly used SMH frameworks. Next, we present the Trauma-Informed Multi-Tiered Systems of Support Model (TI-SEL MTSS)--an adaptation of the TITI-SEL MTSS--to include and emphasize the specific role of SEL as a critical foundational layer within a multi-tiered system of support. The proposed adapted model maintains the key structure of a MTSS while highlighting the importance of embedding SEL pedagogy in daily teaching practices and all aspects of school life. A case study is used to illustrate how the proposed model adaptations can be used in practice and in tandem with TI and SMH services without being conflated as the same service as SEL. Practical implications for implementation are discussed.