Concept maps are diagrams that show relationships between concepts through labeled connections. They were developed by Joseph Novak in the 1970s to represent science knowledge. Concept maps are based on constructivist learning theory and show how new concepts relate to prior knowledge. They organize information visually with core concepts in circles/boxes and relationships shown through labeled lines. Concept maps have various uses including assessing understanding, collaboration, and research analysis. They must include core concepts and labeled relationships to be considered true concept maps.