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.

• 9th Grade
• Geography
• 4 activities
• 20 min–40 min

Learning Objectives

1. Analyze how the geographic distribution of voters influences the outcome of elections in a given district.
2. Evaluate the fairness of a Congressional district map based on established criteria, such as compactness and contiguity.
3. Create an alternative district map for a given state, justifying design choices based on principles of representation.
4. Compare the effects of partisan and racial gerrymandering on minority representation using case studies.

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.

Prepare & details

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.

Setup: Group tables with puzzle envelopes, optional locked boxes

Materials: Puzzle packets (4-6 per group), Lock boxes or code sheets, Timer (projected), Hint cards

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

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.

Prepare & details

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.

Setup: Wall space or tables arranged around room perimeter

Materials: Large paper/poster boards, Markers, Sticky notes for feedback

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

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.

Prepare & details

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.

Setup: Pairs of desks facing each other

Materials: Position briefs (both sides), Note-taking template, Consensus statement template

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

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.

Prepare & details

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.

Setup: Group tables with puzzle envelopes, optional locked boxes

Materials: Puzzle packets (4-6 per group), Lock boxes or code sheets, Timer (projected), Hint cards

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

Teaching This Topic

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.

What to Expect

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.

Watch Out for These Misconceptions

Common Misconception

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

What to Teach Instead

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.

Common Misconception

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

What to Teach Instead

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.

Common Misconception

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

What to Teach Instead

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.

Assessment Ideas

Exit Ticket

After the Mapping Lab, collect students' drawn districts and ask them to label one district as 'packed' and one as 'cracked' using population data from their maps.

Discussion Prompt

During the Structured Academic Controversy, listen for students citing specific criteria from the Voting Rights Act or previous gallery examples to support their positions in the debate.

Quick Check

After the Data Analysis, show two maps and ask students to circle visual features (e.g., contorted shapes, split communities) and calculate the efficiency gap for each to justify their choice.

Extensions & Scaffolding

• Challenge: Ask students to redraw districts using only geographic compactness as a goal, then compare the efficiency gaps with their original designs.
• Scaffolding: Provide pre-sorted demographic data in color-coded tables for students who struggle to synthesize information.
• Deeper exploration: Invite students to research a current court case involving gerrymandering and present how the arguments align with the criteria they debated in class.

Key Vocabulary

Gerrymandering	The practice of drawing electoral district boundaries to favor one political party, group, or incumbent.
Redistricting	The process of redrawing electoral district boundaries, typically done every 10 years after the census to reflect population changes.
Contiguity	The requirement that all parts of a district must be connected geographically.
Compactness	A principle of district drawing that favors shapes that are as close to a square or circle as possible, minimizing irregular boundaries.
Partisan Gerrymandering	Drawing district lines to give one political party an advantage over another.
Racial Gerrymandering	Drawing district lines to dilute or concentrate the voting power of a racial or ethnic group.