Research indicates the influence of socioeconomic factors by general education teachers in the use of Multi-tiered System of Support (MTSS) which was derived from Response to Intervention (RTI) in the placement of urban English Language Learners (ELs) in special education is a topic which needs more attention (Cramer 2015). The purpose of this qualitative case study was to understand how socioeconomic factors influence school supports used in the identification of K-4 EL and special education students in Arizona as perceived by teachers. The research questions guiding this qualitative case study are as follows: RQ1: Do socioeconomic factors influence the use of MTSS interventions? RQ2: Do socioeconomic factors influence the placement of K-4 ELs in special education? RQ3: Does MTSS influence the placement of K-4 ELs in special education? After reviewing the responses from teachers, themes emerged revealing that many schools within Arizona participate in MTSS interventions for students struggling with academics, they participate in the Student Study Team process to discuss specific, targeted interventions to assist students, and there is limited professional development opportunities provided for teachers pertaining to instructing K-4 ELs that have special needs. More research must be completed to fully understand what interventions have taken place before K-4 ELs qualify for special education services. Professional development opportunities must be provided for current teachers as well as training for new teachers in the areas of working with K-4 ELs that have been identified as having special needs. It is also recommended that college courses should be included in the teacher preparation programs training future teachers on implementing instructional strategies which focus on supporting K-4 ELs and whom may have special needs. [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.]