How to attack a stimulus-based MCQ
Most of these questions are not really about history. They are about decoding what is being asked. Learn the four-step habit, then watch it worked step by step on a real test question. Use Back and Next to move through the highlighting.
Practice every unit on the full “Attack the Stimulus MCQ” page →
Networks of Exchange
The Silk Roads, the Mongol Empire, Indian Ocean sea lanes, and trans-Saharan caravans knit Afro-Eurasia together, moving goods, faiths, technologies, people, and disease across the connected world of 1200–1450.
The Connected World, c. 1200–1450
Existing trade routes intensified and new ones opened, binding Afro-Eurasia into a single commercial web. The Silk Roads revived as the Abbasids, Tang–Song China, and later the Mongols made overland travel safer; commercial innovations like China's money economy and "flying cash," plus caravanserai and better camel saddles, expanded the flow of silk, porcelain, and ideas.
The Mongol Empire, forged by Genghis Khan, created the Pax Mongolica, a period of stability that guarded the trade routes and accelerated exchange across Yuan China, the Il-Khanate, and the Golden Horde. Across the seas, monsoon winds and technologies like the lateen sail and astrolabe powered the Indian Ocean network, while camels carried gold and salt across the Sahara.
These networks did more than move goods. They spread Islam, Buddhism, and Hinduism; diffused papermaking, gunpowder, and Champa rice; created diasporic communities; and carried the Black Death, which reshaped societies from China to Europe.
Trade Routes & States of Afro-Eurasia
Highlight each network: the Silk Roads, Indian Ocean, and trans-Saharan trade, and the era’s great states and regions, from Mali and the Swahili coast to the Mongol khanates, Delhi, and Srivijaya. Click anything to load its technology, goods, notable places, and cultural diffusion.
Full Unit Video Review
A complete video walkthrough of Unit 2, the Silk Roads, the Mongol Empire, and the networks of exchange that connected Afro-Eurasia, c. 1200–1450.
Heimler’s History Topic-by-Topic Video Review click to expand ▾
Steve Heimler’s topic-by-topic walkthrough of Unit 2, one short video per CED topic (2.1–2.6), plus his full-unit review. Perfect for reviewing a single concept at a time. Topic 2.7 (Comparison of Economic Exchange) is covered inside the full-unit review.
The Age of Connection
Key moments in the intensifying trade networks of 1200–1450.
Trade Routes of Afro-Eurasia
A real, pannable map of the three great networks, the Silk Roads, Indian Ocean trade, and trans-Saharan caravans. Highlight any route to load its technology, goods, notable places, and cultural diffusion. Click the colored lines and dots to explore.
Stimulus-Based Questions
AP-style questions built on primary and secondary sources. Choose Quick Check for instant feedback, or Test Mode to answer a full set, rate your confidence, and reveal your score at the end, closer to real exam conditions.
Topic-by-Topic Review
Click any topic to expand. Key terms are badged; watch for the AP angle callouts.
Key Terms & Concepts
Think of the answer before the timer runs out, then show it and rate yourself honestly. Cards you rate Shaky or Guessing come back sooner.
Every Term You Need to Know
All of the unit's key terms, A to Z. Filter by word or by topic.
Write What You Know
Pick a topic, then write everything you remember for 5 minutes. When time's up, compare against the full list.
Myth Sweeper: Interrogate
Sweep a minefield of Unit 2 claims, judge each Fact or Myth, then pick the real correction. Miss a fix and the myth detonates.
Hex Web: Connect the Ideas
Drop Unit 2 ideas onto a honeycomb so related ones touch, then explain every connection, continuity, change, cause & effect, comparison, or grouping. Build a web you can defend.
Reconstruct the Unit 2 Narrative
Match each cause or event on the left with its effect or significance on the right. Click one on each side, correct pairs lock in green.
More Review Games
Choose a game mode to review Unit 2 with your class or on your own.
Go Beyond Identification
Don’t just name the source feature, explain why it matters. Practice the “since it was written by a… it may therefore…” move on these Unit 2 sources, then compare to the model.
Visual Sources & HIPP Analysis
Study each primary-source image, answer the AP question, then write your own HIPP analysis and compare it to the exemplar.
Themes Across Unit 2
Organize the whole unit by the six AP thematic lenses, the same categories your reference sheet uses.