US citizen here, all the world maps the teachers had on the walls in school placed the North American continent in the top left, with the Prime Meridian running along the center or very close to it (sometimes things were adjusted a bit so that Siberia would be entirely on the right side of the map instead of straddling both edges). North American-centric world maps might very occasionally show up, but only in contexts where it made more sense to divide Eurasia than the Pacific.