Freedom Flix: ?authCtx=U.600002686n. Britannica online school editionn Middle school: https://school.eb.com/levels/middle World history The modern era: https://worldhistory.abc-clio.com/?webSiteCode=SLN_HMOD&returnToPage=%2f&token=9507AD6AA991AB1C764D036330DFC280&casError=False