This document discusses mental models and conceptual models. It provides exercises for students to draw maps of grocery stores based on their mental models. Students then compare different grocery store websites and evaluate if they support common tasks. The document emphasizes using conceptual models to communicate ideas both within teams and to customers. Examples of conceptual models from other domains are provided, and students are asked to draw a conceptual model of a food delivery website. The goal is for students to learn how to create mental and conceptual models to help design products and services.