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Professional Development Resource for K-12 Mathematics Teachers
Copyright David & Cynthia Thomas,
2009
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Note: Geometers Sketchpad files used in these activities are available here
1 Chapter One: Triangle Recipes
�1.1 Necessary Conditions
�1.1.1 Challenge: Three sides � Three Angles
�1.1.2 Directed Activity: Segment Lengths
�1.1.3 Directed Activity: Angle Sums
�1.1.4 Directed Activity: Construct an Equilateral Triangle Using Straightedge-and-Compass
�1.1.5 Concepts and Connections
�1.1.6 Exercises
�1.2 Triangle Recipes
�1.2.1 Challenge: Spaghetti Triangles
�1.2.2 Directed Activity: Construct an equilateral triangle using the Geometers Sketchpad
�1.2.3 Directed Activity: Construct an equilateral using paper folding
�1.2.4 Directed Activity: Side-Side-Side
�1.2.5 Directed Activity: Side-Angle-Side
�1.2.6 Directed Activity: Duplicate a segment of unknown length
�1.2.7 Concepts and Connections
�1.2.8 Exercises
�1.3 More Triangle Recipes
�1.3.1 Challenge: More Spaghetti Triangles
�1.3.2 Directed Activity: Angle-Side-Angle
�1.3.3 Directed Activity: Angle-Angle-Side
�1.3.4 Directed Activity: Angle-Angle-Angle
�1.3.5 Directed Activity: Side-Side-Angle
�1.3.6 Concepts and Connections
�1.3.7 Exercises
�1.4 Concept Cards
�1.5 Summary
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�2 Chapter Two: Properties of Triangles
�2.1 Area of Triangles
�2.1.1 Directed Activity: Perimeter vs. Area
�2.1.2 Directed Activity: Lattice Triangles
�2.1.3 Directed Activity: Area Formulas
�2.1.4 Concepts and Connections
�2.1.5 Exercises
�2.2 Sides, Angles, and Interior Lines & Points
�2.2.1 Directed Activity: Pythagorean Theorem
�2.2.2 Directed Activity: Pythagorean Triples
�2.2.3 Directed Activity: Angle bisectors
�2.2.4 Directed Activity: Perpendicular lines
�2.2.5 Directed Activity: Parallel lines
�2.2.6 Directed Activity: The Water Treatment Plant
�2.2.7 Directed Activity: The School Bus Garage
�2.2.8 Directed Activity: Balance point
�2.2.9 Concepts and Connections
�2.2.10 Exercises
�2.3 Classification & Hierarchical Relationships
�2.3.1 Directed Activity: Sorting by Attributes
�2.3.2 Concepts and Connections
�2.3.3 Exercise
�2.4 Summary
�3 Chapter Three: Properties of Polygons and Circles
�3.1 Naming, Describing, and Constructing Polygons
�3.1.1 Directed Activity: Names and Attributes of N-gons
�3.1.2 Directed Activity: Constructing a Square
�3.1.3 Directed Activity: Constructing a Parallelogram
�3.1.4 Concepts and Connections
�3.1.5 Exercises
�3.2 Perimeter and Area of Polygons
�3.2.1 Challenge: The Meaning of Area
�3.2.2 Directed Activity: Lattice Polygons
�3.2.3 Directed Activity: Perimeter vs. Area of Rectangles
�3.2.4 Directed Activity: Perimeter vs. Area of Parallelograms
�3.2.5 Directed Activity: Perimeter vs. Area of Pentagons
�3.2.6 Directed Activity: Inside a Parallelogram
�3.2.7 Directed Activity: Area of a Trapezoid
�3.2.8 Directed Activity: Perimeter vs. Area of Regular Pentagons
�3.2.9 Concepts and Connections
�3.2.10 Exercises
�3.3 Circumference and Area of Circles
�3.3.1 Challenge: Measuring the Circumference of the Earth
�3.3.2 Directed Activity: The Area of a Circle
�3.3.3 Concepts and Connections
�3.3.4 Exercises
�3.4 Chapter Three: Summary
�3.5 Chapter Three: Appendix
�4 Chapter Four: Symmetry and Transformation
Geometry
�4.1 Symmetry
�4.1.1 Challenge: Seeing and Describing Geometric Patterns
�4.1.2 Directed Activity: Line Symmetry
�4.1.3 Directed Activity: Point of Symmetry
�4.1.4 Concepts and Connections
�4.2 Linear Transformations
�4.2.1 Directed Activity: Translations
�4.2.2 Directed Activity: Reflections
�4.2.3 Directed Activity: Rotations
�4.2.4 Directed Activity: Dilations
�4.2.5 Directed Activity: Problem-Solving
�4.2.6 Concepts and Connections
�4.2.7 Exercises
�4.3 Applications of Symmetry in Art and Design
�4.3.1 Directed Activity: Tilings
�4.3.2 Directed Activity: Friezes
�4.3.3 Directed Activity: Tessellations
�4.3.4 Directed Activity: Wallpapers
�4.3.5 Concepts and Connections
�4.3.6 Exercises
�4.4 Chapter Four: Summary
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�5 Chapter Five: Coordinate Geometry
�5.1 Points, Segments, and Lines
�5.1.1 Directed Activity: Plotting Points
�5.1.2 Directed Activity: Segment Length
�5.1.3 Directed Activity: Segment Midpoint
�5.1.4 Directed Activity: Slope
�5.1.5 Concepts and Connections
�5.1.6 Exercises
�5.2 Area
�5.2.1 Directed Activity: Triangles and Trapezoids
�5.2.2 Directed Activity: More Triangles
�5.2.3 Directed Activity: Polygon Area
�5.2.4 Concepts and Connections
�5.2.5 Exercises
�5.3 Transformation Geometry
�5.3.1 Directed Activity: Translation
�5.3.2 Directed Activity: Reflection
�5.3.3 Concepts and Connections
�5.3.4 Exercises
�5.4 Chapter Five: Summary
�5.5 Chapter Five: Appendix
�6 Chapter Six: 3-D Geometry and Spatial
Visualization
�6.1 Visualizing 3-Dimensional Objects
�6.1.1 Challenge: What Can You Build With 36 Cubes?
�6.1.2 Directed Activity: Sketching Isometric Views
�6.1.3 Directed Activity: Sketching Front-Top-Side Views
�6.1.4 Directed Activity: The Concept of Dimensionality
�6.1.5 Directed Activity: Five Platonic Solids
�6.1.6 Directed Activity: Geometric Solids and Euler's Formula
�6.1.7 Directed Activity: Slicing Platonic Solids
�6.1.8 Concepts and Connections
�6.1.9 Exercises
�6.2 Surface Area and Volume
�6.2.1 Challenge: Folding the Circle
�6.2.2 Directed Activity: The Concept of Volume
�6.2.3 Directed Activity: The Concept of Surface Area
�6.2.4 Directed Activity: The Volume of an Open Top Box
�6.2.5 Directed Activity: The Surface Area of an Open Top Box
�6.2.6 Concepts and Connections
�6.2.7 Exercises
�6.3 Drawing 3-Dimensional Objects
�6.3.1 Challenge: Hidden Points and Lines
�6.3.2 Directed Activity: 1-Point Perspective of a Tiled Floor
�6.3.3 Directed Activity: 2-Point Perspective of a Box
�6.3.4 Directed Activity: 2-Point Perspective of a House
�6.3.5 Concepts and Connections
�6.3.6 Exercises
�6.4 Chapter Six: Appendix
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