Book excerpt: This edited book explores different international practices in reforming science teacher education programs for STEM education. Incorporating case studies in Asia, the Middle East, Africa, Europe, North America and South America, the contributors emphasise the large variety in STEM teacher preparation. Including science-centric versions of STEM programs as well as more integrated models of STEM, this contextual diversity will help readers learn about the design, opportunities, and challenges of STEM teacher preparation in a variety of circumstances, in order to innovate and improve STEM education more broadly.