What Is a Circle?
Khan Academy KidsA concise and engaging animated introduction to the geometric concept of a circle, featuring Sandy the dingo from Khan Academy Kids. The video provides a clear, age-appropriate definition of a circle as a continuous line with no corners, making abstract geometry accessible for early learners. The content focuses on identifying 2D shapes and connecting mathematical concepts to the real world. By defining a circle by its attributes—specifically the lack of corners and the continuous round nature—it helps build the foundation for geometric reasoning and shape classification. This resource is highly valuable for Pre-K and Kindergarten classrooms as a quick hook or review. Its simple visual demonstration and connection to a familiar object (a tennis ball) allow teachers to easily pivot into activities involving shape hunting, sorting, or drawing. The short duration matches the attention span of the target age group perfectly.