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##### Seeing is Believing An Exeter Retrospective

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**Seeing is BelievingAn Exeter Retrospective**Jonathan Choate jchoate@groton.org www.zebragraph.com**How did I get here?**• I bought my first Apple 2 in the late 70’s for three reasons. • i) My handwriting was awful • ii) I’m a geometer at heart • iii) I was doing the school schedule**What did I do with it?**• Discovered the power of a spreadsheet. • Created a Dynamo simulator. • Wrote simple graphics programs. • Helped produce Bank Street Writer.**April 1985, I met Anja Greer at a conference in Sturbridge,**MA.**The First Phillips Exeter Math**and Technology Conference MAJOR SPEAKERS: Zalman Usiskin, University of Chicago Judah Schwartz, Harvard University Michal Yerushalmy, Harvard University John Kemeny, Dartmouth College Stephen Maurer, Swarthmore College**And here is what we taught**Algebra/Getting Started This seminar is for those who have yet to make much use of the computer in their teaching. Participants will develop worksheets which explore mathematical ideas using simple BASIC programs. Tehh objective will be to integrate this material into the participant's own curricular structure. Topics from algebra and precalculus will be used. Leader: Bill Campbell (Phillips Exeter Academy)**Geometry/LOGO**The use of LOGO with young children is well known; it is being used increasingly often with high school students for exploring geometry and teaching a structured approach to problem solving. This seminar will present materials appropriate for a standard high school geometry course. Leader: Joseph Aieta (Weston High School)**Geometry/"Geometric Supposer“**"The Geometric Supposer" is a commercially available software item, co-developed by guest speakers Judah Schwartz and Michal Yersushalmy, which offers exciting opportunities for conjecturing. This seminar will present one teacher's approach to incorporating "The Geometric Supposer" into a standard high school geometry course. Leader: Richard Houde (Weston High School)**Pre-Calculus/Elementary Functions**The computer will be used to develop many topics from the standard algebra and pre-calculus curriculum: solutions to equations, graphing elementary functions, sequences, series, trigonometry, limits, matrices, and so forth. Teacher-designed programs will be demonstrated as well as commercial software such as muMath, TK-Solver, Green Globs, and Graph Guesser. Leader: Jon Choate (Groton School)**Potpourri**Offered primarily for those teachers who would rather write their own software, this seminar will present one teacher's attempts to stimulate his students mathematically using the computer as a natural resource. Example will be provided at all levels, and it is hoped that participants will bring ideas to share. Leader: Richard Parris (Phillips Exeter Academy)**Calculus**This seminar will focus on the use of the computer as a tool for conceptual development of introductory calculus. Participants will explore strategies for using tool-kit and symbol-manipulation programs (muMath) in the teaching of the subject. Leader: Kathleen Heid (Penn State University)**Mathematical Modeling**The power of mathematics to describe and explain the real world is vividly demonstrated through the use of computer simulation models, in which discrete approximations to continuous functions permit realism without the use of calculus. Participants will learn to build models as well as to use existing models in their teaching. Models will be selected to demonstrate the wide variety of application areas appropriate for simulation. Leaders: Jennifer Kemeny (M.I.T) and David Myers (The Winsor School)**Contemporary Algorithmic Mathematics**A contemporary emphasis in mathematics, both in research and in college teaching, is on algorithmic thinking - not only to compute answers, but also to suggest problems and even to do proofs. This theme will be illustrated with material appropriate at the secondary level, such as sequences and series, linear equations, and graph theory. Leader: Stephen Maurer (Swarthmore College)**Statistics**This seminar will explore the use of the computer to crunch numbers and to facilitate statistical computations. Topics will include measures of central tendency, standard deviation, confidence intervals, line of best fit, and chi-square tests. Leader: To be determined**What was the focus?**-The use of a limited number of available Softwares such as Green Globs and Visi-Calc. - The use of programming languages such as BASIC and LOGO to create programs for classroom use.**What We Didn’t Have**-The ability to share files and information. -The ability to project from a computer. -The ability to stay in touch after a course was over. - Graphing Calculators !!!!!!!!! - Sophisticated Computer Graphics - The Internet**Some Examples of The Power of Computer Graphics**• My Favorite Problem Visualized - Geometric Construction Programs • Natural Forms - Creating Fractals • 3D Geometry • Google’s Free SketchUp • Mathematica 3D • Interactive Demos - Mathematica’s Manipulate Command**Some Examples of The Power of Computer Graphics**• My Favorite Problem Visualized - Geometric Construction Programs • Natural Forms - Creating Fractals • 3D Geometry • Google’s Free SketchUp • Mathematica 3D • Interactive Demos - Mathematica’s Manipulate Command**Making A Fern**http://ecademy.agnesscott.edu/~lriddle/ifskit/**Some Examples of The Power of Computer Graphics**• My Favorite Problem Visualized - Geometric Construction Programs • Natural Forms - Creating Fractals • 3D Geometry • Google’s Free SketchUp • Mathematica 3D • Interactive Demos - Mathematica’s Manipulate Command**Visualizing 3D Geometry**exeter tetra.gsp**Some Examples of The Power of Computer Graphics**• My Favorite Problem Visualized - Geometric Construction Programs • Natural Forms - Creating Fractals • 3D Geometry • Google’s Free SketchUp • Mathematica 3D • Interactive Demos - Mathematica’s Manipulate Command**Some Examples of The Power of Computer Graphics**• My Favorite Problem Visualized - Geometric Construction Programs • Natural Forms - Creating Fractals • 3D Geometry • Google’s Free SketchUp • Mathematica 3D • Interactive Demos - Mathematica’s Manipulate Command**Some Closing Thoughts**Impact of graphing calculators Google vs. Facebook What is Next?**A Final Question**In the information age, what does it mean to be mathematically literate?