Created in collaboration with the Zero Barriers in STEM Education Advisory Committee, the "Zero Barriers in STEM Education Accessibility and Inclusion Workbook" provides strategies on ways to integrate inclusive/Universal Design for Learning practices into the K-12 STEM classroom. Our goal is to empower teachers to structure lessons to address the needs of all students, including those with disabilities. The workbook provides strategies which can be implemented into new or existing lessons to make them more accessible and creates a culture of inclusivity in the classroom. This document is intended to be accessible to all users, including screen reader users. Features included are: (1) Bookmarks; (2) Logical reading order; (3) Proper tagging, including headings, paragraph text, lists, and tables; (4) Figures with alt-text; and (5) Primary language set to English. [Additional funds for this work were provided by the Smithsonian Accessibility Innovation Funds (SAIF).]