Founding of the National Academy (Gukhak)
King Sinmun founded the Gukhak, a Confucian academy to train officials steeped in Confucian political ideals who would support the throne.

Alain Seguin · CC BY-SA 3.0 · Source
Students aged 15 to 30 studied for up to nine years, with the Analects and the Classic of Filial Piety as required texts. King Gyeongdeok renamed it the Taehakgam.
Head-rank-six Confucian scholars now served the king. Gangsu was famed for diplomatic letters, while Wonhyo’s son Seol Chong systematized idu to read the classics in Korean and wrote the parable Hwawanggye urging Sinmun to keep to virtue.