Early intervention in preschool mathematics instruction is key. Studies have shown that the development of early math skills may be the single most important factor for determining future school success. This school improvement plan lays out the necessary steps that the Sioux City Community School District (SCCSD) can follow to implement a Multi-tiered System of Support (MTSS) for the Preschool Initiative classrooms that are a part of the Iowa Statewide Voluntary Preschool Program for Four-Year-Olds. This plan includes providing teachers who are a part of the Sioux City Community School District’s early childhood special education classrooms and the community partner classrooms with the necessary resources and supports to develop MTSS within their own classrooms so that they can ensure that all students can be successful in learning early math concepts. Equipping the youngest learners with early mathematical skills will lay a solid foundation for future math learning and success.