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Technology 
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Platonic Solids

Platonic solids (Math 7)+ 
Java Applet 
Tool 

[1]

This virtual manipulative allows you to display, rotate, and resize Platonic solids. It also allows you to select vertices, edges, and faces, and show that the number of vertices minus the number of e...
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Platonic Solids  Duals

Platonic solids (Math 7) 
Java Applet 
Tool 

[0]

With this applet it can be seen that a platonic dual is two platonic solids, one placed inside the other. The vertices of the inner platonic solid are the center points of each of the surfaces of the ...
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Platonic Solids  Slicing

Platonic solids (Math 7) 
Java Applet 
Tool 

[2]

This virtual manipulative displays a platonic solid on the left and the outline of a plane that slices through it on the right.
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Plot Plans and Silhouettes

Perspective (3D in 2D) (Math 7) 
Java Applet 
Tool 

[0]

Visualization activity; given front and side views, devise a workable top view (with heights). Instructions and discussion built in.
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Rectangular Prism Volume

2D nets > 3D figures (Math 7) 
Java Applet 
Tool 

[1]

The classic "box folding problem." This applet demonstrates the calculation of the volume of a rectangular prism. What height gives the largest volume?
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Rotating Houses

Perspective (3D in 2D) (Math 7) 
Java Applet 
Tool 

[2]

Students are presented with a 3d figure created with blocks that can be rotated and flipped using a mouse. The figure must be rotated until it matches a 2d representation of one of the views. There ...
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Side Length, Volume, and Surfa...

Surface area (Math 7)+ 
Java Applet 
Tool 

[0]

The user can manipulate the scale factor that links two threedimensional rectangular prisms and learn about the relationships among edge lengths, surface areas, and volumes.
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Sliding Blocks Puzzle Game

Geometry in space (Math 7) 
Java Applet 
Tool 

[0]

Completing the puzzle requires removing the red square from the puzzle area so think hard and come up with a good strategy.
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Space Blocks

Polyhedra (Math 7) 
Java Applet 
Tool 

[1]

Create and discover patterns using three dimensional blocks.
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Space Blocks (tPoW version)

2D nets > 3D figures (Math 7) 
Java Applet 
Tool 

[3]

Manipulate the threedimensional blocks to think about what the arrangement looks like from a front, side, and/or back view. Visualize a twodimensional representation in a threedimensional environme...
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Studying Polyhedra

Platonic solids (Math 7) 
Java Applet 
Tool 

[1]

What is a polyhedron? A definition and a Java applet to help in exploring the five regular polyhedra to find how many faces and vertices each has, and what polygons make up the faces. Also links to a ...
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Surface Area and Volume

Polyhedra (Math 7)+ 
Java Applet 
Tool 

[1]

This activity allows the user to to manipulate threedimensional polyhedrons to experiment with surface area and volume.
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Tomography Game

Geometry in space (Math 7)+ 
Java Applet 
Tool 

[4]

This game challenges you to identify a threedimensional object based only on its intersections with a plane. The height of this plane can be changed using a slider control. This simulation of a compu...
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Tomography Game: Practice

Geometry in space (Math 7)+ 
Java Applet 
Tool 

[1]

A practice area to review or learn to identify the categories and their objects that can appear in the Tomography Game.
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Training spatial visualization...

Geometry in space (Math 7) 
Java Applet 
Tool 

[4]

This applet is a 3D game to train spatial visualization. The user must rotate a 3D solid and identify three letters that make an English word.
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3d ploter

Geometry in space (Math 7) 
JavaScript 
Tool 

[0]

The program uses the HTML5 canvas (HTML5 canvas javascript API) and web workers. Mathematical calculations are performed using the web workers, and the results are drawn on the canvas surface. Applica...
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Cone, Sphere, and Cylinder Vol...

Volume (Math 7) 
JavaScript 
Tool 

[0]

Enter the radius and height and the script will calculate the volume for the 3 shapes. If the height is equal to 2r, the relationship of the cone being 1/3 of the volume of the cylinder, the sphere be...
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Cylinders, Cones, and Spheres

Cylinder (Math 7)+ 
JavaScript 
Tool 

[0]

The user learns about cylinders, cones, and spheres and the properties and volume formulas for each. After viewing examples, users can interactively test their understanding of these threedimensiona...
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Prisms

Prisms (Math 7) 
JavaScript 
Tool 

[0]

The user reviews prisms and the formulas for their volume. After viewing examples, users can interactively test their understanding of prisms.
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Pyramids

Polyhedra (Math 7)+ 
JavaScript 
Tool 

[0]

The user reviews pyramids and the formula for finding its volume. After viewing examples, users can interactively test their understanding of the properties of pyramids.
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Space Figures

Polyhedra (Math 7) 
JavaScript 
Tool 

[1]

The user learns about threedimensional figures and the special names given to common space figures. After viewing examples of these figures, users can interactively test their understanding of the p...
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ThreeDimension Figures Unit Q...

Geometry in space (Math 7) 
JavaScript 
Tool 

[0]

Users can interactively test their understanding of the properties of threedimensional figures with this unit quiz.
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Torus Games

Geometry in space (Math 7) 
iPad 
Tool 

[0]

Eight familiar games introduce children ages 10 and up to the mindstretching possibility of a “multiconnected universe”. Games include: tictactoe, mazes, crossword puzzles, word search puzzles, jig...
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Building a House

Geometry in space (Math 7) 
Java Applet 
Technology PoW 

[2]

Use a Java applet from the Freudenthal Institute to help find the largest number of cubes and the smallest number of cubes to make the house pictured in the problem.
NOTE: A free l...
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How Many Cubes?

2D nets > 3D figures (Math 7) 
Java Applet 
Technology PoW 

[5]

Given the front view and side view of an arrangement of cubes, students are asked for the largest number of cubes that could have been used to make the arrangement, as well as the smallest number poss...
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