This document introduces logic models and explains their purpose and usefulness. It defines the core components of a logic model, including resources/inputs, activities, outputs, outcomes, and impact. A logic model is a visual representation that shows the relationship between the resources invested in a program and the results or changes expected to occur. It provides a roadmap to help stakeholders understand how a program is intended to work. The document uses a hypothetical example of planning a family trip to demonstrate how to develop and read a basic logic model. Logic models are useful tools for program planning, implementation, evaluation, and improvement.