Transformations and Congruence · Weeks 10-18

Proving Triangle Congruence

Students will apply SSS, SAS, ASA, AAS, and HL congruence postulates to write formal proofs.

About This Topic

Imperialism in China during the 19th century was characterized not by direct colonial rule, but by 'Spheres of Influence' and 'Unequal Treaties.' This topic covers the Opium Wars, where Britain used military force to protect its illegal drug trade, and the subsequent carving up of China by various powers. Students also examine internal responses, such as the devastating Taiping Rebellion and the anti-foreign Boxer Rebellion.

For 10th graders, this topic explains the 'Century of Humiliation' that still informs Chinese foreign policy today. It highlights the role of economic interests in driving international conflict and the impact of the US 'Open Door Policy.' This topic particularly benefits from hands-on, student-centered approaches like a mock negotiation of an 'Unequal Treaty,' where students see the power imbalance firsthand.

Active Learning Ideas

Mock Negotiation: The Treaty of Nanjing

Students represent the British and the Qing Dynasty. The British team is given 'military advantage' cards, while the Chinese team must try to protect their sovereignty, illustrating why the resulting treaty was so one-sided.

⏱ 50 min·Small Groups

Generate mission

Gallery Walk: The Boxer Rebellion

Stations feature Boxer propaganda, photos of the Eight-Nation Alliance, and the 'Boxer Protocol.' Students analyze why a group of peasants would believe they were immune to bullets and why the international response was so unified.

⏱ 40 min·Pairs

Generate mission

Think-Pair-Share: The Open Door Policy

Pairs discuss the US 'Open Door' notes. They evaluate whether this was a move to 'protect' China or simply a way for the US to ensure it wasn't left out of the Chinese market.

⏱ 25 min·Pairs

Generate mission

Watch Out for These Misconceptions

Common Misconception

China was colonized by the British just like India was.

What to Teach Instead

China remained technically independent but lost control over its economy and key ports (Spheres of Influence). A map activity showing 'treaty ports' versus 'colonies' helps students understand this distinction.

Common Misconception

The Opium Wars were about the British defending 'free trade.'

What to Teach Instead

While the British used that rhetoric, they were specifically forcing the sale of an addictive drug that was illegal in China and Britain. Peer analysis of Lin Zexu's letter to Queen Victoria helps students see the moral argument.

Frequently Asked Questions

What were the Opium Wars?

Two wars in the mid-19th century between China and Western powers (primarily Britain). They were sparked by the Chinese government's attempt to stop the British from smuggling opium into the country, which was causing widespread addiction and economic drain.

What are 'Spheres of Influence'?

These were areas in China where a foreign nation (like France, Germany, or Japan) had exclusive trading rights and economic privileges, even though the territory still officially belonged to the Chinese government.

What was the Taiping Rebellion?

A massive civil war in China (1850-1864) led by Hong Xiuquan, who claimed to be the brother of Jesus. It was a response to economic hardship and the perceived weakness of the Qing Dynasty, resulting in an estimated 20-30 million deaths.

How can active learning help students understand imperialism in China?

By role-playing the negotiation of an 'Unequal Treaty,' students experience the frustration of losing sovereignty. This active approach helps them understand why these events are still remembered as a 'Century of Humiliation' in China, making the historical grievances more tangible and less abstract.

Browse curriculum by country

• Americas
• US
• CA
• MX
• CL
• CO
• BR

• Europe
• UK
• IE
• FR
• DE
• ES
• IT
• NL
• PT
• SE

• Asia & Pacific
• IN
• SG
• AU