The Indiana STEM Ecosystem is a founding member of the STEM Learning Ecosystems Community of Practice (SLECoP) and has grown to over 450 members across the state of Indiana since 2015. Through early partnerships between Lilly, IDOE, & Purdue University’s Indiana Science Initiative (ISI), the I-STEM Resource Network was forged. These partnerships created the original Indiana STEM Action Coalition. Over several years of ongoing support, new partners came on board to support the efforts, including the Indiana Afterschool Network, the Marion County STEM Coalition, Rolls-Royce Corporation, and others. In 2019, the Indiana STEM Action Coalition was renamed the Indiana STEM Ecosystem and since has served across the state as a mediary embedded within various means of fiscal and organizational support from other established organizations.