The 'Three Teachings' chapter of the Baihu Tong is about how the Xia, Shang and Zhou dynasties taught the people.
Tips
culture
Usually 儒 (Confucianism), 释 (Buddhism, after 释迦牟尼) and 道 (Daoism), also written 儒释道. In late imperial times the belief that the three are one let many temples house Confucius, the Buddha and Laozi side by side.
history
In the Han text 白虎通, 三教 means something older: the teachings of the three early dynasties, loyalty (忠) under the Xia, reverence (敬) under the Shang and refinement (文) under the Zhou.