What is the main reason for why children did not go to school in the US during the 1800s?

Explanation:

It's hard to imagine, but in the 1800s a single teacher taught grades one through eight in the same room. Rural areas were just too sparsely populated to support multiple classrooms, so towns built one-room schools about 20-by-30 feet large. In the 1800s, Horace Mann of Massachusetts led the common-school movement, which advocated for local property taxes financing public schools. Mann promoted locally controlled, often one-room “common schools” in which children of all ages and classes were taught together; later he introduced the age-grading system.

the first historical instance of china engaging in internationalism was during the han dynasty.[1] at the start of the han dynasty, the huns in the north were attacking the frontiers of han and trying to obtain riches. emperor wu of han wanted to gain an alliance with a country called dayuezhi so the two countries could join together and fight against the huns.[2] to obtain this alliance, emperor wu sent zhang qian to the west to establish economic and cultural connections.[2] history records that during the han dynasty there were four primary avenues of contact between china and europe. they included the northern land route, the central land route, the southern sea route, and the far southern sea route.[1] the most famous of these routes is the central land route, or the classical silk road, comprising a network of roads stretching from northwest china to the ports of syria and the black sea, which passed through the oasis of the turkestans and northern persia.[1] the silk road was significant for chinese emperors because it provided dominance over central asia by developing resources and provided new markets for the export of china's most valuable resources.[1]

1920 census

2010 census