[History] Why Are All My Students Deposed Crown Princes?!

Song Zhou possesses the Emperor's Teacher System from the Quick Transmigration Bureau. His mission is to become the emperor's teacher in every world. Song Zhou thinks that becoming an emperor's teacher is no easy feat, but surely teaching a crown prince can't be that hard?

Who knew that teaching a crown prince would be easy enough, but making him successfully inherit the throne would be so, so difficult!

He has to mediate the relationship between the crown prince and the emperor, help the prince develop a healthy attitude toward love, worry about the emperor living too long, and, above all, keep the prince from being raised completely wrong [bold and underlined for emphasis].

Sigh. Another day of wanting to quit.

① Teacher to Fusu, eldest son of Qin Shi Huang

Today's lesson plan: Be benevolent, be strategic, and trust your father.

Fusu: Teacher is right. Then I'll leave all these government affairs to Father. I'm going to the fields to see the newly discovered high-yield crops.

② Teacher to Liu Ju, crown prince of Emperor Wu of Han

Today's lesson plan: Know when to push and when to rest, and don't take the blame for others.

Liu Ju: Teacher is right. Let's stir things up, stir things up, stir things up, keep Father and the ministers busy, and then no one will keep an eye on me!

③ Teacher to Yang Yong, crown prince of Emperor Wen of Sui

Today's lesson plan: No decadent extravagance. Practice frugality.

Yang Yong: Teacher is right. Let's get wind and solar power going, and make sure we recycle our resources.

④ Teacher to Li Chengqian, crown prince of Emperor Taizong of Tang

Today's lesson plan: Science is far more fascinating than beauty. Start learning young.

Chengqian: Teacher is right. Science is so captivating. I'm willing to devote my whole life to it.

⑤ Teacher to Zhu Biao, crown prince of Emperor Taizu of Ming

Today's lesson plan: Your health is essential to taking the throne. Don't die young.

Zhu Biao: Teacher is right. Medicine is truly marvelous. Why don't we build a few more medical research institutes?

⑥ Teacher to Yinreng, crown prince of Emperor Shengzu of Qing

Today's lesson plan: The emperor's living too long. Better start something of your own.

Yinreng: Teacher is right. Our dream is the stars and the sea! There's no time like the present, so why don't we set sail today?

Ying Zheng / Liu Che / Yang Jian / Li Shimin / Zhu Yuanzhang / Xuan Ye: Get back here and inherit the throne!

Song Chu: Sigh, I might have overdone it a little. How is that my fault?

Thanks to @Yueyacai for the cover.

Premise: A teacher is a force for good.