Grade 7 · Social studies · 30 minutes
Unit 1 · Trade, Geography and Change · Lesson 1 of 2
How Geography Changes a Trade Decision
Read a route diagram and compare costs without assuming physical geography determines every outcome.
Mr. S Teaches · Original starter mini-lesson · MS7-SOC-01Learning objective
Construct a route diagram and justify a transport choice using cost, time and geographic evidence.
Before you begin
- Read map directions and multiply whole numbers.
Gather your materials
- Paper or notebook
- Pencil and the passage, model directions or data printed in this lesson
Language to know
- trade network
- Connected places and routes through which goods move.
- transport cost
- Resources used to move goods from one place to another.
- geographic constraint
- A physical feature that limits or changes possible routes.
Understand the concept
Fictional regional account: Inland Town I sends grain to coastal Port P. A river route I→R→P is 80 km and costs 2 tokens per 10 km; it takes four days. A mountain road I→M→P is 50 km and costs 5 tokens per 10 km; it takes two days. The river closes during a winter freeze. Geography shapes costs and timing, but technology, agreements and people’s choices also influence trade. Draw both routes using these distances and annotate the river and mountain features.
Teach it step by step
- Read the account and draw I, R, M and P with two labeled paths, using distinct river and road symbols.
- Calculate the total transport cost of each route, keeping distance and time separate.
- Choose a route for nonperishable grain with no urgent deadline and justify it from the account.
- Reevaluate for a winter shipment or two-day deadline; explain why one route is not always best.
Make the thinking visible
Worked example or model response
The river costs (80 ÷ 10) × 2 = 16 tokens. The road costs (50 ÷ 10) × 5 = 25 tokens. The river is cheaper for a four-day nonurgent trip, even though it is longer. A two-day deadline favors the road if it remains open.
Guided practice
Together connect the account’s freezing sentence to a seasonal change on the map. Explain why a lower listed price is irrelevant if the route is closed.
Independent practice
Write two recommendations: one for a summer shipment with a five-day deadline and one for a winter shipment. Include an annotated route sketch and a question about a missing factor, such as spoilage or safety.
Quick assessment
Why does the shorter route cost more in this model?
Answer key & assessment criteria
Answers and teaching guidance
- Guided: A frozen route is unavailable; the decision must consider access as well as posted cost.
- Independent: Summer with five days allows the 16-token river route; the closed winter river makes the 25-token road the supplied option. A complete answer identifies missing evidence rather than inventing conditions.
- Quick check: Its per-distance price is higher, illustrating that distance alone does not determine total transport cost.
Look for: Look for a claim that answers this lesson’s question, accurate use of the supplied evidence and an explanation of a limit or alternative. Ask the learner to point to the detail supporting each inference.
Make it work for your learner
More support
Provide a two-route outline and a cost table with the first multiplication started.
Extension challenge
Add a hypothetical canal that changes distance and cost, then explain why the model cannot predict its political or environmental effects from transport prices alone.
Selected contributions · Official sources
Standards connections
Subject-content alignment not yet verified
Supporting Common Core literacy connection
RH.6-8.7Common Core · Grades 6–8
Connect maps or tables with social studies prose.
Read the official standard ↗The provided social studies passage/source is explicitly analyzed in the activity. This selected literacy practice does not establish subject-content alignment or complete coverage of the standard.
Source and mapping checked 2026-11-04. This mini-lesson contributes selected skills; it does not claim full attainment.