This lesson unit is intended to help you assess how well students are able to solve real-life mathematical problems. In particular, students will develop their abilities in the following areas:
- Using proportional relationships to solve multistep ratio and percent problems.
- Drawing inferences about a population from a random sample of data.
- Making and stating assumptions based on real-life situations.

The lesson unit is structured in the following way:

- Before the lesson, students attempt the Selling Soup task individually. You review their solutions and formulate questions that will help students to improve their work.
- At the start of the lesson, students respond individually to the questions set.
- In groups, students combine their thinking and work together to produce a collaborative solution in the form of a poster.
- In the same small groups, students evaluate and comment on some sample responses. They evaluate these responses and compare them with their own work.
- In a whole-class discussion, students explain and compare solution strategies.
- Finally, students reflect on their work and their learning.