In case you are trying the MARS MAP Classroom Challenges for the first time, it is recommended that you read the Brief Guide for teachers and administrators before you get started.
Before the lesson, students work individually on an assessment task designed to reveal their current understanding and difficulties. You then review their work and create questions for them to answer in order to improve their solutions.
At the start of the lesson students work alone, answering your questions about the same problem. They are then grouped and engage in a collaborative discussion of the same task.
In the same small groups, students are given sample solutions to comment on and evaluate.
In a whole-class discussion, students explain and compare the alternative solution strategies they have seen and used.
To help you assess how well students are able to solve a real-world modeling problem. There are several correct approaches to the problem, including some that involve proportional relationships.