Budgeting · Lesson Plan

Cottage Budget Project

In this real-world budgeting project, students design and finish a small (16-foot-square) cottage while staying within a fixed budget. Working from a construction price list, they choose materials and systems — roofing, insulation, sheetrock, siding, flooring, windows and doors, a kitchen, and mechanical systems — calculate quantities and costs for a 256-square-foot structure, and justify their choices. It is a hands-on lesson in cost/benefit analysis, working with a budget, and the importance of units. Prices in the packet are illustrative 2026 estimates — not a contractor quote — and teachers may substitute current local prices.

Grades 8–12 Lesson Plan Multiple class periods Free Lesson

For Teachers

Lesson at a glance

Topic: Budgeting
Grade Level: Grades 8–12
Resource Type: Lesson + Worksheet
Estimated Time: Multiple class periods
Format: Lesson + worksheet
Materials: Project packet (price list, budget exercise, vocabulary, reference sheets), calculators, pencils

What Students Learn

Learning objectives

Evaluate alternatives, including cost and benefit
Work within a fixed budget
Calculate material quantities and costs for a real structure
Present and substantiate a plan and its reasoning
Understand the importance of specifying units when representing a value

Materials

What you’ll need

The printable Cottage Budget project packet (below) — price list, budgeting exercise, homework, vocabulary reference, and the “I have, who has?” review
Calculators
Notebooks and writing implements

Key Terms

Vocabulary

Cost-effective: Economical in terms of the goods or services received for the money spent.
Coverage: The amount of area a given quantity of a product extends over.
Square footage: The area of a surface, measured in square feet (length × width).
Building codes: A set of rules and regulations governing the methods of construction.
Unit of measure: A precisely specified quantity (for example, a linear foot or a 4′ × 8′ sheet).

For Teachers

Lesson plan

Intended audience: grades 8–12 (mathematics). Time: several class periods.

Prerequisite knowledge: solid basic arithmetic, exponents, and the interpretation of mathematical operators and equations, plus foundational algebra and geometry. The terms and process are briefly reviewed in the opening presentation.

Procedure

Introduction. Present the agenda and advance organizer, run a do-now warm-up, distribute the packet, and review the lesson scenario — designing and finishing a 16-foot-square cottage within a budget.
Pre-reading perspective. Get students thinking about managing a construction project and examining alternatives, building the concepts needed for the math to come.
Vocabulary review. Students run the “I have, who has?” exercise (in the packet) to review key construction terms.
Group budgeting exercise. Given the fixed budget and a set of required elements, students choose items from the price list, compute quantities and costs for the cottage, and prepare a statement of the work to be done — without exceeding the budget.
Wrap-up and homework. Review the homework options, respond to questions, and offer extra help.

Warm-up answer: 204 — the sum of the squares on an 8×8 board (8² + 7² + … + 1² = 204).

Assessment. Answers will vary depending on the options each student or group selects. Assess whether every required element is included, the budget is not exceeded, quantities and costs are calculated correctly with proper units, and choices are clearly justified.

Discussion

Discussion questions

Which required elements drive the largest share of your budget, and why?
Where did you choose a more expensive option because its benefit was worth the cost?
How did you calculate the quantity of each material for a 16-foot-square cottage?
Why does specifying the unit of measure matter when you read a price list?
If your budget were cut by a quarter, what would you change first?

Printable Lesson & Worksheet