Smithsonian History Explorer is an online portal from the National Museum of American History that offers artifact images, videos, primary sources, and lesson plans for teaching U.S. history. Students can explore everything from lunchboxes and protest posters to presidential objects, connecting big themes to real items people used. Educators and families appreciate the high-quality images and ready-made activities created by museum educators. It’s best for upper elementary through high school, though some resources work with younger kids. Navigating the site requires some time and curation, but the depth is impressive. Using artifacts as prompts for inquiry projects or object-based writing assignments can make history feel tangible.