This document discusses how technologies can be used to help students build models and learn. It describes how computers present information, judge student answers, and adapt to meet student needs. It also explains that mindtools like concept maps, spreadsheets, expert systems, and databases allow students to conceptualize, organize, solve problems, and model domain knowledge, systems, problems, thinking, and experiences. The document provides examples of each mindtool and discusses why building models with mindtools takes a constructivist approach and supports students owning their knowledge.