 Lesson plan

# 4. Apply scaling down to a real-world situation (A)

teaches Common Core State Standards MP6 http://corestandards.org/Math/Practice/MP6
teaches Common Core State Standards MP4 http://corestandards.org/Math/Practice/MP4
teaches Common Core State Standards MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards 5.NF.B.5.b http://corestandards.org/Math/Content/5/NF/B/5/b
teaches Common Core State Standards 5.NF.B.5.a http://corestandards.org/Math/Content/5/NF/B/5/a
teaches Common Core State Standards 5.NF.B.6 http://corestandards.org/Math/Content/5/NF/B/6
teaches Common Core State Standards 5.NF.B.5 http://corestandards.org/Math/Content/5/NF/B/5

# 4. Apply scaling down to a real-world situation (A)

Lesson objective: Apply understanding of multiplication of fractions less than one to solve real-world problems.

This lesson provides an opportunity for students to apply their knowledge and understanding of multiplying fractions and whole numbers a to real-life situation. Students are asked to create recommendations for scaling down the length of track and the total height and drop of a roller coaster to make it an appropriate size for younger kids.

Key Concept students will use:

• scaling does not always make numbers larger

Skills students will use:

• multiplication of whole numbers and fractions (Grade 4 Unit 11)

Students engage in Mathematical Practice 2 (reason abstractly and quantitatively) as they draw tape diagrams and write equations to interpret the situation of multiplying a number by a fraction less than one.

Key vocabulary:

• dimensions
• scaling
• tape diagram