Lesson objective: Apply the understanding of writing expressions to represent recipe amounts.

This lesson provides an opportunity for students to apply their knowledge and understanding of writing expressions to a real-life situation. Students are asked to convert a bulk recipe to a managable amount to make lemonade.

Key Concept students will use:

- Mathematical relationships can be represented with expressions, and we can use those expressions as we use numbers.

Skills students will use:

- ratio and rate reasoning to convert measurement (Grade 6, Unit 1)
- unit rate to write expressions (Grade 6, Unit 2)
- proportional reasoning to write expressions

Students engage in Mathematical Practice 1 (make sense of problems and persevere in solving them) as they find ways to using proportional reasoning to convert a bulk recipe into usable expressions.

**Key vocabulary: **

- conversion
- cups
- expression
- gallons
- values