Words are only one way of symbolizing ideas. Numbers, pictures, graphs, maps, diagrams, photographs, and other means are also used to convey information. Researchers refer to notational systems such as graphs, diagrams, and maps as "inscriptions." Inscriptions are tools that help people to perceive and to talk about spatial worlds. Spatial literacy is embedded in nearly every discipline in the school curriculum, including mathematics, social studies, science, and the arts. Spatial competence and skill with spatial symbols is essential for careers in engineering, mathematics, science, graphic design and other arts, and many trades and professions, from carpentry to biomedical engineering. By promoting spatial understanding early in life, adults give children an important foundation for the future. Yet teachers do not need another topic in an already crowded curriculum. Rather, they need to understand how to enhance children's spatial reasoning within the context of the work they are already doing. This article suggests strategies teachers can use to include spatial reasoning in the study of mathematics, social studies, science, literacy, and visual arts.