While there are finite legal categories for on-farm labor and learning, many farms structure learning in ways that aren’t adequately described by existing terms, or that stretch the standard definitions of legal options. Here we suggest some terms and definitions for commonly used labor and learning arrangements. As a community of practice evolves in this work, we hope to continue to modify and refine these definitions. This short guide, adapted from the Ag Apprenticeship Toolkit, is intended for existing and aspiring mentor farmers and ag apprenticeship programs.