Unit Plan
CK-12 Foundation

Ck 12: Geometry: Proportion Properties

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] This concept teaches students how to set up and solve proportions.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Proportion Properties

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Apply proportion properties.
Whiteboard
ClassFlow

Class Flow: Solving Proportions

For Teachers 6th - 8th Standards
[Free Registration/Login Required] This lesson introduces the cross product method for solving proportions. It also connects the mathematical content to real-world applications.
Whiteboard
ClassFlow

Class Flow: Similar Shapes

For Teachers 9th - 10th Standards
[Free Registration/Login Required] In this flipchart, students use the drawing and interactive tools in Activstudio to apply geometric properties and relationships to describe, compare, and draw two-dimensional shapes and figures.
Whiteboard
ClassFlow

Class Flow: Proportions

For Teachers 6th - 8th Standards
[Free Registration/Login Required] This lesson contains notes and examples for instructing how to solve proportions. Begins with relations to equivalent fractions, and then gets into solving algebraically using cross products. It...
Activity
Texas Instruments

Texas Instruments: Set Design

For Teachers 6th - 8th
In this activity, students can use similarity concepts, and the dimensions of the carvings on Mt. Rushmore to create a proportional representation of the carvings for a stage backdrop.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Indirect Measurement

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] In this lesson students use similar triangles and proportions to find measurements indirectly. Students examine guided notes, review guided practice, watch...
Activity
Rice University

Rice University: Cynthia Lanius: Golden Ratio

For Students 9th - 10th
This site introduces students to the definition of golden ratio. It gives them a chance to estimate ratios and predict which figures are closest to the golden ratio. There is a link on this page that provides charts for students to...
Lesson Plan
Alabama Learning Exchange

Alex: To Scale or Not to Scale? That Is the Factor.

For Teachers 6th - 8th
Middle schoolers will learn to solve proportions and find missing sides of similar figures using the scale factor. This lesson is best taught before the concept of cross multiplication is developed. Not only will the student learn the...
Activity
Texas Instruments

Texas Instruments: What's My Ratio?

For Teachers 6th - 8th
In this activity, students use linear measurement and calculators to investigate proportionality and determine the constant ratio between similar figures.
Whiteboard
ClassFlow

Class Flow: Ratio

For Teachers 9th - 10th Standards
[Free Registration/Login Required] In this flipchart, students apply their understanding of ratio, percent, and direct proportion in various situations. Students solve problems involving ratio and proportion with similar figures and with...
Unit Plan
PBS

Pbs: Human Tree: Dilations

For Students 6th - 8th
Watch as the National Museum of Mathematics uses an image of a visitor to create a "Human Tree" using dilations. This video focuses on how similar figures can create dilations and how exponents can be used in an equation to express the...
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Forms of Ratios

For Students 6th - 8th
[Free Registration/Login may be required to access all resource tools.] In this lesson students find and reduce ratios. Students examine guided notes, review guided practice, watch instructional videos and attempt practice problems.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Forms of Ratios

For Students 6th - 9th
[Free Registration/Login may be required to access all resource tools.] This concept teaches students what a ratio is and how to use one. Students examine guided notes, review guided practice, watch instructional videos and attempt...

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