Geography · 9th Grade

Active learning ideas

Gerrymandering and Electoral Geography

When students manipulate actual maps and data, they see how abstract political rules create real-world consequences. This topic works best when learners experience the tension between fairness and strategy firsthand, rather than memorizing definitions.

• Common Core State Standards
• C3: D2.Civ.5.9-12
• C3: D2.Geo.3.9-12

• 20–40 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Escape Room
• 35 min · Pairs

Mapping Lab: Draw Your Own District

Provide a simplified grid map of a fictional city with demographic and political data for each block. Student pairs must draw five districts that create as many competitive districts as possible, then redraw the same map to give one party a maximum advantage. Comparing their two maps makes the mechanics of gerrymandering concrete and immediate.

Justify who should be responsible for drawing Congressional districts.

Facilitation Tip

During the Mapping Lab, circulate with a checklist to ensure students label population numbers and community boundaries on their districts.

What to look for

Provide students with a simplified map of a fictional state and population data. Ask them to draw one district that is 'packed' (concentrating opposition voters) and one that is 'cracked' (splitting opposition voters across multiple districts), labeling each and briefly explaining the strategy.

• Remember
• Apply
• Analyze
• Relationship Skills
• Self-Management

Activity 02

• Gallery Walk
• 20 min · Small Groups

Gallery Walk: Famous Gerrymanders Through History

Post maps of five historically significant gerrymandered districts (the original Gerry salamander, North Carolina's 1992 12th Congressional District, Maryland's 3rd, Texas's DeLay redistricting, and a recent state legislative example). Students annotate each map with what electoral outcome the shape was designed to produce and what geographic or demographic manipulation technique was used.

Analyze how gerrymandering impacts the representation of minority groups.

Facilitation Tip

For the Gallery Walk, pair students to annotate gerrymandered districts with arrows showing 'packing' and 'cracking' before discussing historical context.

What to look for

Pose the question: 'Given the challenges of creating a perfectly neutral map, what criteria should be prioritized when drawing district lines (e.g., compactness, contiguity, representation of communities of interest)?' Facilitate a debate where students defend their chosen priorities.

• Understand
• Apply
• Analyze
• Create
• Relationship Skills
• Social Awareness

Activity 03

• Structured Academic Controversy
• 40 min · Small Groups

Structured Academic Controversy: Who Should Draw the Lines?

Groups of four debate two positions: (A) state legislatures should control redistricting because elected officials are democratically accountable, versus (B) independent nonpartisan commissions should draw districts because elected officials have a conflict of interest. After advocating their assigned positions, pairs switch and advocate the opposite, then collaborate on a joint recommendation with geographic and democratic justification.

Evaluate whether it is possible to create a 'fair' political map.

Facilitation Tip

In the Structured Academic Controversy, assign roles explicitly so each student must defend a position using evidence from the same data set.

What to look for

Show students two sample district maps for the same area. Ask them to identify which map is more likely gerrymandered and to provide at least two specific visual or data-based reasons for their choice.

• Analyze
• Evaluate
• Create
• Social Awareness
• Relationship Skills

Activity 04

• Escape Room
• 30 min · Small Groups

Data Analysis: Efficiency Gap and Packing vs. Cracking

Provide students with simplified vote share data from a gerrymandered and a non-gerrymandered state. Students calculate the efficiency gap (simplified version) for each, then classify districts as 'packed' (concentrating opposition voters) or 'cracked' (diluting them across multiple districts). Class discusses whether the efficiency gap is a reliable measure of fairness.

Justify who should be responsible for drawing Congressional districts.

Facilitation Tip

For the Data Analysis, provide a calculator template to prevent arithmetic errors when computing efficiency gaps.

What to look for

Provide students with a simplified map of a fictional state and population data. Ask them to draw one district that is 'packed' (concentrating opposition voters) and one that is 'cracked' (splitting opposition voters across multiple districts), labeling each and briefly explaining the strategy.

• Remember
• Apply
• Analyze
• Relationship Skills
• Self-Management

A few notes on teaching this unit

Teachers often begin with a brief historical example to establish why gerrymandering matters, but the key is to let students confront the ambiguity of 'fairness' themselves. Avoid lecturing on legal standards upfront; instead, let the activities reveal the complexity. Research shows that students retain more when they grapple with conflicting values rather than absorbing definitions.

Successful learning looks like students using geographic and demographic data to justify their district designs while recognizing the trade-offs in each choice. They should articulate why no single map can satisfy all priorities equally.

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Watch Out for These Misconceptions

• During the Gallery Walk, watch for students assuming gerrymandering always benefits Republicans.

  Use the Maryland and Illinois examples in the gallery to prompt students to identify districts drawn by Democrats and ask them to explain what makes these cases gerrymanders.

• During the Structured Academic Controversy, watch for students claiming that creating majority-minority districts is always racial gerrymandering.

  Have students consult the Voting Rights Act excerpt provided for the debate and ask them to distinguish between legally required majority-minority districts and unconstitutional racial gerrymandering in their examples.

• During the Mapping Lab, watch for students assuming independent commissions automatically produce fair districts.

  Direct students to compare their own district designs with the constraints listed in the lab instructions, and ask them to identify which criteria conflict in their maps.

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Methods used in this brief

• Escape Room
• Gallery Walk
• Structured Academic Controversy