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Topic (Course) 
Technology 
Type 
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Law of Sines Ambiguous Case

Ambiguous Case (Trigonometry) 
Sketchpad 
Activity 

[1]

Use a Geometer's Sketchpad file to investigate the ambiguous case of the law of sines.
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Examining Angles in Polygons

Angles of polygons (Math 7)+ 
Sketchpad 
Activity 

[0]

Help students to discover or reinforce the angle formulas associated with polygons. Includes an activity in PDF format and a prepared sketch.
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A Continuation of Minimum Peri...

Bisectors (Geometry)+ 
Sketchpad 
Activity 

[0]

A further guided exploration of triangles inscribed within triangles, using Geometer's Sketchpad.
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A Minimum Perimeter Inscribed ...

Bisectors (Geometry)+ 
Sketchpad 
Activity 

[0]

A guided exploration about triangle inscribed within triangles, and the conditions under which their perimeter is at a minimum, using Geometer's Sketchpad.
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Angle Bisectors in a Triangle

Bisectors (Geometry)+ 
Sketchpad 
Activity 

[0]

A guided exploration of the angle bisectors of a triangle, and the point at which they intersect, using Geometer's Sketchpad.
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Simple Properties of Angle Bis...

Bisectors (Geometry)+ 
Sketchpad 
Activity 

[0]

A guided exploration using Geometer's Sketchpad of some properties of angle bisectors in a triangle.
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Exploring Centers of a Triangl...

Centers of triangles (Geometry) 
Sketchpad 
Activity 

[0]

Using problem solving skills, formal geometry, and The Geometer's Sketchpad, students will model and solve two realworld problems by constructing the incenter and circumcenter of triangles. St...
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Exploring Centers of a Triangl...

Centers of triangles (Geometry) 
Sketchpad 
Activity 

[0]

Using problem solving skills, formal geometry, and The Geometer's Sketchpad, students will model and solve a realworld problem by constructing the centroid of a triangle. Students will explore...
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Medians in a Triangle

Centers of triangles (Geometry) 
Sketchpad 
Activity 

[0]

Students discover various properties of the three medians of a triangle. The link to the activity itself is to a zip file that contains a pdf file of the activity.
This is a free sample a...
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Two Minimum Length Problems an...

Centers of triangles (Geometry)+ 
Sketchpad 
Activity 

[0]

A guided exploration of minimum distances from vertices of a triangle or quadrilateral to a point within the figure, using Geometer's Sketchpad.
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Chords in a Circle

Chords (Geometry) 
Sketchpad 
Activity 

[0]

Students construct chords in a circle and manipulate them to discover various properties. The link to the activity itself is to a zip file that contains a pdf file of the activity.
This i...
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A Japanese Temple Problem

Circles (Geometry)+ 
Sketchpad 
Activity 

[0]

In this guided Geometer's Sketchpad exploration, students use their knowledge of tangent circles to discover a relationship between the radii of three circles which are mutually tangent to each other ...
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Determining the Uniqueness of ...

Circles (Geometry) 
Sketchpad 
Activity 

[0]

Are there a certain number of arbitrary points such that there exists a unique circle through them? To explore and conjecture an answer to this question, students will construct circles passing throug...
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Kissing Circles

Circles (Geometry)+ 
Sketchpad 
Activity 

[0]

This guided exploration, using Geometer's Sketchpad, examines the properties of tangent circles ("osculating" or kissing circles).
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Exploring Conic Sections with ...

Conic sections (Algebra II)+ 
Sketchpad 
Activity 
$ 
[0]

Students will explore the richness of conic sections by building their own physical models and then constructing more flexible models with Sketchpad. Students retain a solid connection with th...
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Introduction to Radians

Deg  Rad  Grad (Trigonometry) 
Sketchpad 
Activity 

[0]

Students learn about radian measure and investigate a Sketchpad simulation that approximates pi to two decimal places. The link to the activity itself is to a zip file that contains both the activi...
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Slopes and Derivatives

Derivatives analytically (Calculus)+ 
Sketchpad 
Activity 

[0]

This activity demonstrates one of the many ways Sketchpad can be used in a calculus or math analysis class. Students manipulate a tangent line to a curve to investigate what it means for a curve to ha...
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Ellipses: The Congruent Triang...

Ellipses (Algebra II)+ 
Sketchpad 
Activity 

[0]

A pair of congruent triangles holds the key to this unusual Sketchpad ellipse construction. The link to the activity itself is to a zip file that contains both the activity in pdf format and the co...
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Mellow Yellow: Interpreting Gr...

Equations and functions (Math 6)+ 
Sketchpad 
Activity 

[0]

Compare different representations of motion: a story, a position graph, and the motion itself. Create a graph that matches a story, or write a story to match a graph, and check either by watching Mell...
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Exterior Angles in a Polygon

Exterior (Geometry)+ 
Sketchpad 
Activity 

[0]

Students construct a pentagon with its exterior angles, measure the angles and find the sum. They then dilate the pentagon to look at the problem, and understand their result, in a new way. The lin...
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Slope Pix Lab

Find slope (Math 7)+ 
Sketchpad 
Activity 

[1]

This is a computer activity using Sketchpad and specially selected pictures located online (SlopePix web page) to help students understand the concept of slope. Following the instructions, students...
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The Slope Game

Find slope (Math 7)+ 
Sketchpad 
Activity 

[1]

Students use a twoplayer game to develop and refine their sense of the slopes of lines. The link to the activity itself is to a zip file that contains both the activity in pdf format and the corr...
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Exploring Calculus with The Ge...

General (Calculus) 
Sketchpad 
Activity 
$ 
[0]

The 32 blackline master activities in this collection give students the opportunity to directly experience the dynamic, geometric nature of calculus. Activities cover the fundamental concepts in any f...
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Rethinking Proof with The Geom...

General (Geometry) 
Sketchpad 
Activity 
$ 
[0]

This book harnesses the power of Dynamic Geometry® to engage students in proving conjectures and thinking about proof in different ways. Rethinking Proof offers other motivations for pro...
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Geometry Activities for Middle...

Geometry in the plane (Math 5)+ 
Sketchpad 
Activity 
$ 
[0]

These activities provide students with the opportunity to explore geometric concepts such as symmetry, transformations, and even fractal geometry in a way no other teaching tool can. The dynamic ca...
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