Curated OER
Time for All Ages
Fourth graders discover time keeping by analyzing technological advances in history. In this time lesson plan, 4th graders create and complete a KWL chart based on their research of a famous timekeeping invention, such as a sundial....
Smithsonian Institution
National Museum of American History
At the museum's online home, find illustrated and interactive overviews of its collections and programs, along with an extensive set of innovative resources for teaching and learning about major events and themes in American history and...