Algebra

What Did One Angle Say to the Other Angles? (August 2008) Visualizing Summation Formulas (August 2006) Biology as a Source for Algebra Equations: The Heart (November 2005) Biology as a Source for Algebra Equations: Insects (August 2005) Discovering and Exploring Mandelbrot Set Points with a Graphing Calculator (August 2004)Using Graphing Calculators to Model Real-World Data (May 2004) A Millennium Prize Problem for Students (January 2003)

What Did One Angle Say to the Other Angles? (August 2008)

Visualizing Summation Formulas (August 2006)

Biology as a Source for Algebra Equations: The Heart (November 2005)

Biology as a Source for Algebra Equations: Insects (August 2005)

Discovering and Exploring Mandelbrot Set Points with a Graphing Calculator (August 2004)Using Graphing Calculators to Model Real-World Data (May 2004)

A Millennium Prize Problem for Students (January 2003)

Geometry

Using Overhead Projectors to Explore Size Change Transformations (March 2005) Exponential Growth through Pattern Exploration (February 2005) Using Geometry Software to Revisit the Ellipse (March 2004) Geoboard Areas: Students' Remarkable Ideas (January 2004) Pi Filling, Archimedes Style (March 2007) Sprinklers and Amusements Parks: What Do They Have to Do with Geometry? (February 2007) Using Statistical Testing to Approximate Pi (October 2006)

Using Overhead Projectors to Explore Size Change Transformations (March 2005)

Exponential Growth through Pattern Exploration (February 2005)

Using Geometry Software to Revisit the Ellipse (March 2004)

Geoboard Areas: Students' Remarkable Ideas (January 2004)

Pi Filling, Archimedes Style (March 2007)

Sprinklers and Amusements Parks: What Do They Have to Do with Geometry? (February 2007)

Using Statistical Testing to Approximate Pi (October 2006)

Trigonometry

Trigonometry thourgh a Ferris Wheel (September 2008)

What Did One Angle Say to the Other Angles? (August 2008) A Natural Bridge from Algebra and Geometry to Trigonometry (February 2006) Stop This Runaway Truck, Please (November 2003) Pi Filling, Archimedes Style (March 2007) Introducing Parametric Equations through Graphing Calculator Explorations (May 2006)

A Natural Bridge from Algebra and Geometry to Trigonometry (February 2006)

Stop This Runaway Truck, Please (November 2003)

Introducing Parametric Equations through Graphing Calculator Explorations (May 2006)

Statistics and Data Analysis

Trigonometry thourgh a Ferris Wheel (September 2008) Get the Most Pop for Your Buck! (April 2008) Using GOLO to Illustrate the Sampling Distribution of a Sample Proportion (March 2008) Exploring the United Nations' Human Development Index (October 2007) Using Statistical Testing to Approximate Pi (October 2006) The Three-Point Shoot-Out: The Logic of Hypothesis Testing (April 2006) Using Statistics to Check on Elvis (January 2006) Transformations on Data Sets and Their Effects on Descriptive Statistics (October 2005) Averaging Rates: Deciding When to Use the Harmonic or Arithmetic Mean (May 2005) Teaching Probability and Statistics Using Game Shows (April 2005) Using Graphing Calculators to Model Real-World Data (May 2004) A-B-C, 1-2-3 (April 2004) Let's Play Plinko: A Lesson in Simulations and Experimental Probabilities (December 2003) Massive Graphs, Power Laws, and the World Wide Web (September 2003)

Get the Most Pop for Your Buck! (April 2008)

Using GOLO to Illustrate the Sampling Distribution of a Sample Proportion (March 2008)

Exploring the United Nations' Human Development Index (October 2007)

The Three-Point Shoot-Out: The Logic of Hypothesis Testing (April 2006)

Using Statistics to Check on Elvis (January 2006)

Transformations on Data Sets and Their Effects on Descriptive Statistics (October 2005)

Averaging Rates: Deciding When to Use the Harmonic or Arithmetic Mean (May 2005)

Teaching Probability and Statistics Using Game Shows (April 2005)

Using Graphing Calculators to Model Real-World Data (May 2004)

A-B-C, 1-2-3 (April 2004)

Let's Play Plinko: A Lesson in Simulations and Experimental Probabilities (December 2003)

Massive Graphs, Power Laws, and the World Wide Web (September 2003)

Probability

The Three-Point Shoot-Out: The Logic of Hypothesis Testing (April 2006) Let's Play Plinko: A Lesson in Simulations and Experimental Probabilities (December 2003)

Calculus

Numerical Derivatives (October 2008) Applying Secant Lines and Tangent Lines for the Optimal Placement of Range Lights (May 2008) Curve Stitching: Linking Linear and Quadratic Functions (January 2005)

Numerical Derivatives (October 2008)

Applying Secant Lines and Tangent Lines for the Optimal Placement of Range Lights (May 2008)

Curve Stitching: Linking Linear and Quadratic Functions (January 2005)

Number and Operations

Unit Fractions and Their "Basimal" Representations: Exploring Patterns (November 2004)

Mathematical Connections

Biology as a Source for Algebra Equations: The Heart (November 2005) Biology as a Source for Algebra Equations: Insects (August 2005) Demonstrating Boolean Logic Using Simple Electrical Circuits (February 2004)

Demonstrating Boolean Logic Using Simple Electrical Circuits (February 2004)

Everyday Math

Managing Returns in a Catalog Distribution Center (September 2004) Using Graphing Calculators to Model Real-World Data (May 2004)

Managing Returns in a Catalog Distribution Center (September 2004)

Fractals

Discovering and Exploring Mandelbrot Set Points with a Graphing Calculator (August 2004)

Logic

Graphs

Massive Graphs, Power Laws, and the World Wide Web (September 2003)Using Graphs to Introduce Functions (February 2003) Introducing Parametric Equations through Graphing Calculator Explorations (May 2006)

Massive Graphs, Power Laws, and the World Wide Web (September 2003)Using Graphs to Introduce Functions (February 2003)

Technology

Numerical Derivatives (October 2008) Using GOLO to Illustrate the Sampling Distribution of a Sample Proportion (March 2008) Pi Filling, Archimedes Style (March 2007) Sprinklers and Amusements Parks: What Do They Have to Do with Geometry? (February 2007) Introducing Parametric Equations through Graphing Calculator Explorations (May 2006)

Proportional Thinking

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