The purpose of this activity is for students to calculate the cost of finishing a room in the tiny house they designed. Students will have a cost sheet with common items, but, if time permits, students could research the cost of additional items that are not listed. Also, the lesson could be extended by having students finish a second room in their tiny house design.

When students decide which room to work on and which items to purchase for the room, with a constraint of $1,000, they model with mathematics (MP4).

• Display students' work.
• “Tómense un momento para hacer un recorrido y ver qué habitaciones escogieron sus compañeros y cómo las terminaron. Escriban algo que observen y algo que se pregunten” // “Take some time to walk around and see what room your classmates chose to finish and how they finished the room. Write down something that you notice and something that you wonder.”
• 3–5 minutes: independent work time
• 1 minute: partner discussion
• Share responses.