Students will launch the expedition design challenge by analyzing what makes a route workable, solving short rational-number map problems, and producing an initial route draft they can improve with early feedback.

Students will study authentic route-planning examples, define measurable expedition criteria and constraints, and use rational-number calculations to create an evidence-based design brief, initial map draft, and route log plan.

Students will compare multiple expedition route concepts with a weighted decision matrix, justify a team route choice using map data and rational-number calculations, build a rapid route map prototype, and run short route tests that generate evidence for revision in the next phase.

Students will use test evidence, peer critique, and visitor questions to revise expedition routes, improve rational-number calculations, rehearse route stations, and assemble a final portfolio that documents revisions, trade-offs, and mathematical reasoning.

Students will present their final expedition map set and navigation kit to an authentic audience, explain the rational-number reasoning behind key route decisions, respond to visitor questions using evidence from their portfolio, and complete the final assessed route log reflection on how feedback, disagreement, or setbacks changed the final plan.