Archive Trail makes printable US history lessons built on real documents — short primary sources with context notes, questions, and answer keys for middle and high school classrooms. Every excerpt is quoted from a public-domain source and cited with a link so students can check it. Teaching text (notes, questions, keys) is AI-assisted and disclosed on each product; the historical documents themselves are not AI-generated. Start with the free Road to Revolution sampler, or run a one-period printable escape room set in Philadelphia during the 1918 influenza week.