Lesson Plan (Grades 9-12): Wall Street Math Showdown - Building Portfolios, Tracking Risk, and Defending Investment Choices

Focus: Engage students in a competitive, real-world financial math simulation where they build a mock investment portfolio, analyze market trends, calculate percent change and returns, compare risk levels, and defend an investment strategy using quantitative evidence. Students act like analysts and investors as they balance growth, stability, and decision-making under uncertainty.

Grade Level: 9-12

Subject Area: Math • Personal Finance/Economics • ELA • Inquiry/Skills

Total Unit Duration: 1 core lesson with 2 optional extension lessons

I. Introduction

Students become financial analysts in a fast-paced Wall Street Math Showdown where numbers, strategy, and risk all matter. In the core lesson, students examine market snapshots, compare investment choices such as stocks, bonds, index funds, or savings options, and use percent change, returns, and risk data to build a mock portfolio. Instead of simply picking “winning” stocks, students must justify why their portfolio choices make sense for a particular goal or investor profile. The lesson feels competitive and career-connected, but it remains highly academic by requiring precise math, data interpretation, and evidence-based argument.

Essential Questions

• How do investors use data to make decisions about where to put money?
• What is the relationship between risk and return?
• How can percent change and other calculations help us track portfolio performance?
• Why might two people choose very different portfolios even when looking at the same market information?
• What makes an investment argument strong, realistic, and evidence-based?

II. Objectives and Standards

Learning Objectives — Students will be able to:

1. Analyze basic market data and identify patterns in price movement and portfolio performance.
2. Calculate percent change, gains, losses, and simple return values for investment choices.
3. Build a mock portfolio based on a stated goal, budget, or investor profile.
4. Compare investment options in terms of risk, potential reward, and diversification.
5. Use quantitative evidence to defend an investment strategy in writing and speaking.
6. Revise or justify portfolio choices after responding to questions or new information.

Standards Alignment

• CCSS.MATH.CONTENT.HSN.Q.A.1
  • Use units as a way to understand problems and to guide the solution of multi-step problems; choose and interpret units consistently in formulas and data displays.
• CCSS.MATH.CONTENT.HSN.Q.A.2
  • Define appropriate quantities for the purpose of descriptive modeling.
• CCSS.MATH.CONTENT.HSF.IF.B.4
  • For a function that models a relationship between two quantities, interpret key features of graphs and tables in terms of the quantities.
• CCSS.MATH.CONTENT.HSS.ID.B.6
  • Represent data on two quantitative variables on a scatter plot, and describe how the variables are related.
• CCSS.ELA-LITERACY.SL.9-10.4 / SL.11-12.4
  • Present information, findings, and supporting evidence clearly, concisely, and logically such that listeners can follow the line of reasoning.
• CCSS.ELA-LITERACY.W.9-10.1 / W.11-12.1
  • Write arguments to support claims using valid reasoning and relevant and sufficient evidence.
• C3 Framework D2.Eco.1.9-12
  • Analyze how incentives influence choices that may result in policies with a range of costs and benefits for different groups.
• C3 Framework D2.Eco.7.9-12
  • Use benefits and costs to evaluate decisions made by individuals, businesses, and governments.

Success Criteria — Student Language

• I can calculate percent change and explain what it means in an investment situation.
• I can compare investments based on risk, potential return, and overall strategy.
• I can build a portfolio that matches a clear investor goal.
• I can use charts, tables, or data to explain why I made certain choices.
• I can defend my investment plan in writing or discussion using evidence, not guesses.