This guide from the American Institutes for Research and the CEEDAR Center serves as a funding guide for Registered Teacher Apprenticeship Programs (R-TAPs). A training model that is approved by the U.S. Department of Labor or state apprenticeship agency, R-TAPs are designed to help combat teacher shortages by creating accessible career pathways. The guide highlights the various federal and state funding sources available to sustain these apprenticeship programs and considers program design, field support, wraparound services, and scholarships. By consolidating information to help R-TAPs access a variety of funding sources, this resource helps these apprenticeships build their programs to meet the recommended standards and design principles developed by the National Education Association and the American Federation of Teachers.