State David Ausubel's theory of 1963 ​

He argued that there is a hierarchical organization of knowledge and that new information can be incorporated into the already existing hierarchy.

(202 bc - 220 ad) dynasty started by lui bang; a great and long-lasting rule, it discarded the harsh policies of the qin dynasty and adopted confucian principles; han rulers chose officials who passed the civil service exams rather than birth; it was a time of prosperity