The document analyzes a 6th grade mathematics module called "Building a Fish Rack" that teaches concepts of proof, properties, perimeter, and area in a culturally relevant context. The module uses the traditional Yup'ik practice of building fish racks to dry salmon. Students learn about the form and function of fish racks, and explore the underlying mathematics through activities like using ropes to measure diagonals and ensure a rectangular base. The module addresses multicultural education themes like raising mathematics achievement, improving access to high-level math, using ethnomathematics, and connecting math to students' lives. Studies found this culturally-based approach improved math scores more than traditional curricula.