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high

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high

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medium

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medium

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article from CNN.com

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article from Slate.com

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Begin with Guatemalan sinkhole problem.
Get students interested.
The Situation

In 2010, an enormous sinkhole suddenly appeared in the middle of a Guatemalan neighborhood and swallowed a three-story building above it.

The Challenge(s)

How much material will they need to fill the sinkhole?

How much will it cost to fill the sinkhole in?

Question(s) To Ask

These questions may be useful in helping students down the problem solving path:

What is a guess that is too low?

What is a guess that is too high?

What is your best guess?

What information do we need to know to figure this out?

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conceptual

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Demonstration: Volume of a Cone and Cylinder

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Geometry Teachers Never Spend Time Trying to Find Materials for Your Lessons Again! Join Our Geometry Teacher Community Today! http://geometrycoach.com/Geometry-Lesson-Plans/?pa=MOOMOOMATH The volume of a cone is 1/3 the volume of a cylinder that has an equal base and height. This video shows you both Mathematical and by filling a cylinder with water using three cones.

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procedural

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openmiddle.com-Cone and Cylinder Volumes (1)

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procedural

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8.G.9 – Know the formulas for the volumes of cones, cylinders, and spheres and use them to solve real-world and mathematical problems.

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8.G.9 – Know the formulas for the volumes of cones, cylinders, and spheres and use them to solve real-world and mathematical problems.