 BTU Calculator  HearthNet
A calculator that estimates the heating needs of a room, a combination of rooms, or an entire home. Enter the length and width of the area to be heated and select the climate and insulation factors from the popup boxes. A Java version of this calculator
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 BUBL Link: Libraries of Networked Knowledge
A searchable national information service for the UK higher education community. Directory of UK organisations and institutions; Archive of LIS, journals, Internet development; abstracts, full text, hundreds of titles of journals; news: jobs, events,
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 Budgeting Money (SMILE)  Yolanda Smith, Douglass Math and Science Academy
A lesson for grades 68 designed to teach students how to budget a monthly income; basic math techniques integrated with reading and social studies skills; how to search for employment in the want ad section of a newspaper; and the difference between
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 Buffon's Needle  Michael J. Hurben
A Java applet that simulates a Monte Carlo method for the estimation of the value of pi, 3.14159265... The user controls the speed of simulating the dropping of up to 100,000 needles or pins on equally spaced parallel lines, while a bar graph displays
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 Buffon's Needle (MSTE)  George Reese; University of Illinois at UrbanaChampaign (UIUC)
Buffon's Needle, first stated in 1777, is one of the oldest problems in the field of geometrical probability. It involves dropping a needle on a lined sheet of paper and determining the probability of the needle crossing one of the lines on the page.
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 Buffon's Needle  Paul Kunkel
An investigation of the problem: Consider a plane, ruled with equidistant parallel lines, where the distance between the lines is D. A needle of length L is tossed onto the plane. What is the probability that the needle intersects one or more lines?
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 Buffon's Needling Ants  Ivars Peterson (MathTrek)
The idea of estimating pi by randomly casting a needle onto an infinite plane ruled with parallel lines was first proposed by the naturalist and mathematician Georges Louis Leclerc Comte de Buffon (17071788). In recent years, computer
simulations have
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 bugman123.com  Paul Nylander
Tessellations, gear spheres, hyperbolic geometry, fractals, hypercomplex fractals, minimal surfaces, and more original mathematical artwork. See also Nylander's simulations of physics phenomena such as the magnetic field of a solenoid, 2D waveparticles,
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 Build a Recreation Center Using Geometry  Gwen Neuberger, Community High School, West Chicago, IL
"Our geometry class is being asked to design a recreation center for the children of West Chicago. Money is no object. The class will be divided into groups of approximately four students." The site includes a lesson plan and scenario, as well as pages
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 Building an Icosahedron as a Class Project  Frederick J. Wicklin
A Teacher's Guide. This document describes how to build an icosahedron as a class project. The size is up to you. Stepbystep instructions are provided, as well as figures, diagrams, and templates.
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 Building a Virtual Museum Community  Jamie McKenzie
Virtual museums provide an excellent opportunity for museums to partner with schools. The Bellingham (WA) public schools recognized the potential of a partnership with the Whatcom County Museum of History and Art in Fall of 1995. This article describes
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 Building Big  WGBH Educational Foundation
Explore great feats of engineering and the ingenuity of the engineers, architects, and builders who designed and built them. Learn about bridges, domes, skyscrapers, dams, and tunnels; use Flash interactive engineering labs to experiment with forces,
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 Building Blocks  Doug Clements and Julie Sarama, University at Buffalo, State University of New York
Supplementary and enrichment math materials for young children. Project writings include "Mathematics in the Preschool"; "'Concrete' Manipulatives, Concrete Ideas"; "Mathematics for Young Children"; "Technology and School Change: New Lamps for Old?";
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 Building Homes of Our Own  National Association of Home Builders (NAHB)
An interactive teaching tool for the middle and high school classrooms. The simulation presents a macro view of the entire home building process, from site selection to final sale. Students collect information, solve problems and make choices as they
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 Building Models of Connectivity: A 7layer Model  John Sechrest
The process of deploying networks and computers into organizations or communities has several layers that need to be addressed to maximize the effectiveness of the technology. This outlines 7 layers of issues surrounding the organizational process of
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 Building Models of Surfaces  Joan Hoffman, Swarthmore College
Physical models to be used as aids in understanding 3dimensional surfaces  some howto pages for building surfaces that appear in multivariable calculus, by Swarthmore College student Joan Hoffmann.
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 Build Your Own Blocks  Mönig, Jens; Harvey, Brian
Turn, move, animate, and iterate figures with this visual programming language, which also lets you draw simple and complex fractals through recursion. Download Build Your Own Blocks (BYOB); watch tutorials; report bugs; and more. Originally designed
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 Bureau of Economic Analysis (BEA)  U.S. Department of Commerce
The nation's economic accountant, preparing estimates that illuminate key national, international, and regional aspects of the U.S. economy. Regional, national, and international data, articles, and products.
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 Bureau of Justice Statistics  U.S. Department of Justice
The BJS collects, analyzes, publishes, and disseminates information on crime, criminal offenders, victims of crime, and the operation of justice systems at all levels of government. Key statistics by topic; list of publications, with abstracts, many of
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 Bureau of Labor Statistics  JoAnn L. Yu
The BLS collects information on the U.S. labor force, the economy, etc. Includes "The Economy at a Glance," press releases with relevant statistics, timeseries of various data, regional data, various publications, and information about jobs in the bureau.
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 Burning 1Hour Fuses in 45 Minutes (Math Chat)  Frank Morgan, MAA Online
You have two onehour fuses: lighting one end of a fuse will cause it to burn down to the other end in exactly one hour's time. You know nothing else about the fuses; in particular you don't know how long any segment of a fuse will burn, only that an
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 Burnt Toast Publishing  Bran McMillin
Burnt Toast Publishing offers the math puzzles for free use.
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 The Burr Puzzles Site  IBM
A Burr Puzzle consists of at least three rods intersecting each other at right angles. The most wellknown type is the six piece burr where three sets of two rods intersect each other. This site lets you explore six piece burrs by selecting from a list
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 Bus Boarding and the Theory of Knots  Roy Lisker
This article is a humorous application of basic Knot Theory to the situations encountered when people are trying to board a bus in a great hurry. Their trajectories create braided patterns whicha are 'analyzed' with the help of the theory of knots.
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 Buses on Quantum Schedules  Ivars Peterson (MathTrek)
Anyone who has waited for a bus in the city has probably casually observed that, after an inordinately long wait, two or three buses often come along at the same time. Mathematical models that simulate traffic flow confirm that bus bunching is a real
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 BusinessHigher Education Forum  BusinessHigher Education Forum
BHEF is an organization of Fortune 500 CEOs, prominent college and university presidents, and foundation leaders working to advance innovative solutions to education challenges in order to enhance U.S. competitiveness. BHEF addresses education issues
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 Business Mathematics  MAA Online
From the Mathematical Association of America's Basic Library List  a bibliography of articles (in print, not on the Web) on Business Mathematics: Basic Skills; Algebra and Finite Mathematics; Business Statistics; Business Calculus; Economics; Finance;
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 Business Statistics (BSAD 301)  L. H. Arjomand; School of Business, Clayton College & University
An online credit course (Georgia system) with lecture notes, Powerpoint slides, sample exam questions, course syllabus, projects, solutions to problems, mailing lists, statistics links, magazines/newspapers, library, FAQs, and a bulletin board. Lecture
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 Busyness Girl Mathematics  Maria H. Andersen, Muskegon Community College
Posts on this blog about technology for math courses have discussed WolframAlpha and other websites for online instruction as well as for classroom use.
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 ButlerCooley Excellence in Teaching Awards  Turnaround Management Association (TMA)
This program, made possible through the John William Butler Foundation, honors elementary and secondary grade teachers who have demonstrated exceptional dedication and skill in shaping the lives of students and the communities in which they live. It awards
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 Butterfly Station  Manfred Ullman
Applets for exploring spirographs, pendula, the Mandelbrot set, and Lorenz attractors.
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 The Butterfly Theorem  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Ten proofs (and a few variations) of the beautiful Butterfly theorem, with illustrations and remarks. Links to some generalizations: A Better Butterfly theorem, 2NWinged Butterfly theorem, several pages on the Two Butterflies theorem. Several of these
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 The Butterfly Website Picture Galleries  Mikula Web Solutions, Inc.
Symmetry in nature: butterfly and moth images from a variety of sources. In most cases, a small picture is included for speed of transmission, and a larger picture is available by clicking on the small picture.
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 Bytes of Science: An Internet Magazine  David S. Mazel, Ed.
An Internet magazine on science and engineering, with tutorials and introductory articles on various areas of science, math, or engineering. Articles include: A Basis for Functions: The Fourier Series; The Fourier Transform: The Frequency in a Waveform;
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 Byte Works, Inc.
Developers of the apps iPhone Calculator, a scientific/logic/conversion calculator; and techBASIC, which takes advantage of the iPod's, iPhone's, and iPad's builtin accelerometers, gyroscopes, or magnetometers to collect information, process it with
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 By the Numbers  Kinder Magic Software
Practice basic consumer math skills with Java applets that pace you though arithmetic problems, step by step: addition or subtraction of whole numbers or of decimals, percent markup, multiplication by one and twodigit numbers, multiplying decimals,
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 Byzantine Basketball  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
A problem (with solution) sent by Prof. W. McWorter's: Byzantine Basketball is like regular basketball except that foul shots are worth a points instead of two points and field shots are worth b points instead of three points. Moreover, in Byzantine Basketball
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 C26: Geometry  Scott Thatcher; Dept. of Mathematics, Northwestern Univ., Evanston, IL
Syllabus for a Geometry course, with some solutions to problems in PDF format; Maple worksheets (version 4) for multivariable calculus.
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 CAARMS, The Council for African and Americans in the Mathematical Sciences  Mathematics Dept., SUNY Buffalo
An organization that highlights current research by AfricanAmerican researchers and graduate students in mathematics, strengthens the mathematical sciences by encouraging increased participation of AfricanAmericans and members of other underrepresented
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 Cable's Leaders in Learning Awards
Cable's Leaders in Learning Awards recognizes outstanding educators, administrators, policymakers, and other community leaders at the forefront of innovation in education. Award categories include: Cable Partnerships for Learning, Pushing the Envelope
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 Cabri Conic Macros  Jim King, University of Washington
Nine Cabri Geometry II macros for constructing conics from various givens and for constructing certain features of given conics. Contains a documentation file.
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 Cabri Geometry: Classroom Resources  The Math Forum
The Math Forum's page of links at the Forum and on the Web to dynamic interactive geometry classroom resources for Cabri Geometry. Books and Web sites; Frequently Asked Questions; exploring the basics; workshops; excerpts from the journal abraCAdaBRI;
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 Cabrigéomètre  JeanMarie Laborde
The French site for Cabri Geometry, the geometry software program. The site includes a brief history of the program, a list of new things on the site (see also CabriJava), Cabri product information, book and website references, and contact information.
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 Cabri Java Applets  Jenchung Chuan
Well over one hundred applets based on Cabri drawings.
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 Cabri Java Project/Projet CabriJava
CabriJava allows you to create dynamic geometric figures using Cabri and publish them as Java applets. In English and French.
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 Cabri Jr.  Texas Instruments Incorporated
Interactive geometry for the calculator: construct, analyze, and transform mathematical models and geometric diagrams. Cabri Jr. imports and exports figures from Windows computers. Take a tutorial, preview and download weekly activities, or browse the
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 CA Classical Analysis (Front for the Mathematics ArXiv)  Univ. of California, Davis
Classical Analysis preprints, from the U.C. Davis front end for the xxx.lanl.gov ePrint archive, a major site for mathematics preprints that has incorporated many formerly independent specialist archives. Search by keyword or browse by topic.
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 CADalog.com
An AutoCAD CAD Shareware Clearinghouse, offering a collection of over 4,000 shareware programs for CAD engineers, designers, graphics people, etc. Also a very large free 2d and a minimalcost 3d parts library with hardtofind parts.
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 CAD/CAM Developer's Kit C Function Libraries  John Keklak
The CAD/CAM Developer's Kits support very fast and reliable algorithms for
boundary offset, area fill, pocketing and area booleans. The offset
algorithm is an alternative to the Voronoi approach, and in many real world
cases is much faster and reliable.
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 CADCOM: Committee for the Advancement of Discrete and Combinatorial Mathematics  Chris Rodger, Auburn University, USA (Chair)
An international committee formed by the Institute for Combinatorics and its Applications (ICA) to present Combinatorics and Discrete Mathematics in its best light to all interested people and agencies, including university administrations, industry,
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