If you pay an attention to the authentic and other records of Rhee dynasty, you will sure find how important concerns did go to the education of crown prince. It seems that one of the most important educational objectives was to train him to be a great king with wisdoms and virtures. At that time, there was an educational system, called as Sae-Ja-Sigang-Won which consisted of 12 faculty members. They lectured primarily Chinese classics and history, and tried to bring up the prince moralistically good personality. The Sigangwon was to promoted to the high hierarchy, Jong Sampum-Amun(三品衙門) by Jung Jo, 22nd King of the Rhee dynasty and increased its staff members to the 20. When the prince was considered to be mature enough to receive formal education, a great entrance ceremoney was held and promulgate publicy the prince's entrance to the “school”. The school years of prince was not specific, but according to record, it seems it was generally begining from of the 10 years old. The prince's teacher, standing aloof from any partisan strifes of political interests generally called as “Doctor”, were named among high ranking public officer from Duejae Hak, (大提學) an higher educational institute at that time. It seem that there were no formal curriculum for prince education but Chunjamoon (千字文), Dong mong Sunsup(童蒙先習) Tong gam(通鑑), So-Hak(小學), Saso(四書) etc., are considered to be the main subjects. There was no criteria in selecting the curriculum. Therefore there often occurred disputes about them. The human relationships between prince and his teacher was just those between son and father, as a strict Korean traditional customs and mores. According to the record, it is not exaggerated that the teachers was highly treated socially and ecomically. In a way, the prince education seems fallen in lethargy under the excessive formalism (even in a socially critical area during Korea-Japan war in 1395-139, there were much disputes on the procedures of prince entrance ceremony.) But this would not justify to over-look the bright points in prince education. It should be higly appreciated that they paid much attentions to the education and tried to embue the Confucianistic morality in the minds of public general and establish a good educational climate in the society modelling after this prince educational system.