STEAM (science, technology, engineering, art, and math) and student-centered instruction are seeing a rapid growth in popularity, but their reach is not adequately distributed across diversity groups (diversity can include different genders, economic backgrounds, immigrant backgrounds, abilities, and races, among other characteristics). The CreaSTEAM project intends to address diversity gaps through the development of STEAM-Labs, which are student-centered spaces that combine components of fab labs, media labs, and user labs to specifically target diversity gaps. To gather data on existing best practices that will be used in the STEAM-Labs, this paper carried out an informal PRISMA systematic review on a collection of 124 worldwide STEAM diversity initiatives. The analysis studied the initiatives’ founding years, as well as the overall STEAM content area prevalence and diversity target area prevalence of the set. The analysis found that STEM was the most common content area, and gender was the most common diversity target area. There has been a large increase in initiative creation since the early 2010s.