Three-dimensional (3D) printing has become more affordable and accessible to educators in recent years. The combination of this technology with open access has enormous transformative potential for science, technology, engineering, and mathematic (STEM) education, particularly in the development of open education resource (OER) 3D models. Complex structures can be 3D printed such as the human heart for anatomy courses, protein configurations for biology, crystal lattices for geology, orbital models for physics, or machine components for engineering. These models can be 3D printed at a fraction of commercial costs. Printed models can also be tailored to specific learning needs. Furthermore, a printable STL file can be shared online and used by anyone in the world with access to a 3D printer. Despite these advantages, most educators face barriers to implementation such as where to source digital models, how to choose a printer, or how to integrate these models into their courses. This hands-on workshop will address these challenges by teaching participants the fundamental workflow of 3D printing, including printer types, material options, and software programs (commercial vs. open source). Participants will learn how to locate high-quality printable models through online repositories and explore strategies for integrating these models into their courses. The goal is to empower educators to develop, modify, and share OER 3D printed ancillary materials that enhance student access, engagement, and understanding in STEM disciplines.