 100th Day of School Celebration  Loogootee Community Schools, Loogootee, Indiana
A collection of interactive and other suggested classroom activities for celebrating the 100th day of school, for kids ages 814. A 100 EMail Messages Project invites your class to exchange email worldwide, linking geography and language arts with a
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 100th Day of School Website  Joan Holub
A site created by Joan Holub, illustrator of the book, The 100th Day of School by Angela Medearis (Scholastic), to encourage and enhance 100th Day celebrations in schools. Students may "ask 100 questions" about writing or illustrating books; teachers
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 10 Lessons in Fractals, Complex Patterns, and Chaos  Jon Lee; Math Forum Teacher Exchange
From the WrightConnection 8week summer program, in which Dayton, Ohio, middle and high school math and science teachers participated in the realworld applications of math and science at WrightPatterson Air Force Base. The lessons, which emphasize
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 10th Grade Math Assignments  Richard Briston
A math teacher designs Web pages to serve as monthly math assignments, and as an introduction to the Internet and email for his students at St.Mildred'sLightbourn School in Oakville, Ontario, Canada. Student solutions are included for some assignments.
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 1999 Laptop Learning Challenge (LLC)  Toshiba/NSTA
This challenge rewarded 20 K–12 educators for their innovative uses of laptop computers. The 20 selected lessons may be browsed by subject (abstracts and downloadable PDF files are provided); they have science, mathematics, and technology components and
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 The Abacus: The Art of Calculating with Beads  Luis Fernandes
A tutorial on using the abacus  a calculator whose earliest known use is circa 500 B.C. by the Chinese civilization. Addition, subtraction, division and multiplication can be performed on a standard abacus. Beginning in about 1600 A.D., use and evolution
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 abraCAdaBRI  Yves Martin
Liens et exercises pour le logiciel Cabri Géomètre:
geéométries; affine plane; vectorielle plane; affine de l'espace; non euclidennes; logique (Alice); dossier coniques; pratique de Cabri. In French.
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 The Academy of Inquiry Based Learning
A "big tent" community of instructors, teachers, and supporters of inquirybased learning (IBL), the Academy of Inquiry Based Learning (AIBL) supports the education of students "deeply engaged in rich mathematical tasks who have ample opportunities to
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 Acid Rain Simulation (MSTE)  Louie Beuschlein; University of Illinois at UrbanaChampaign (UIUC)
A twoday unitthat uses decisionmaking ideas from statistics in the science classroom. No previous experience with statistical analysis is necessary. Students make use of sampling to back up a claim, and design (with teacher assistance) a statistical
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 Activating EnergyNet (Handbook of Engaged Learning Projects)  Bonnie Kuhrt; Carl Sandburg Junior High School, Rolling Meadows, IL
Junior high students design resources for other students involved in the EnergyNet data collection and interventions project and create Web pages for a district energy program. Site contains a summary, scenario, student pages, and useful Internet links,
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 Active Algebra  David Womersley, Active Maths Limited
Interactive resources designed to enhance and enrich the teaching and learning of algebra. Free trial version available online; buy the CD and get a password which will remove the evaluation logo from those versions. All the activities can be used either
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 Activities for Kids  Apollo Web Stars
Lesson plans and printable activities can be found under Teacher Help: printouts are available for math worksheets (number chart, addition chart, timed worksheets) and for multiplication tables. You may also search for activities locally by state and
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 Activities & Information Supporting Pi Day Celebration  Carolyn M. Morehouse
Lesson plan, songs, trivia quiz, and refreshments signup sheet for a Pi Day celebration. Hosted by the Math Forum's Teacher Exchange.
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 Adding Integers (SMILE)  John Charles Thomas, N. F. Simeon Vocational High School
A lesson designed to teach students to add and subtract integers, and define terms (additive inverse, identity element of addition, associative property of addition, addend, sum, magnitude). From the Arithmetic section of a collection of almost 200 single
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 Adding Mixed Numbers with Unlike Denominators (SMILE)  Camille Gales, Edward Coles Elementary School
A 7th grade lesson designed to provide students with practice in adding mixed fractions with unlike denominators. From the Arithmetic section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative for Learning Enhancement.
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 Addition and Subtraction of Signed Numbers (SMILE)  David Drymiller, Morgan Park High School
A lesson designed to help students master the addition and subtraction of signed numbers, and learn to recognize linear equations of the form x + a = b and their solutions. From the Arithmetic section of a collection of almost 200 single concept lessons
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 Adventitious Geometry  Tony Davie; School of Mathematical and Computational Sciences, Univ. of St Andrews, Scotland
A brief illustrated page about a seemingly simple problem involving an isosceles triangle with some angles given. Under what circumstances are all the angles in the diagram rational multiples of pi? Further discussion of adventitious quadrangles and concurrent
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 AdventureOnline.com  Learning Outfitters, Inc.
Interdisciplinary curricula that use the Web to connect students to expeditions from around the world, creating motivating, realtime materials for K12 classrooms. Thematic content includes traditional and online lessons, games, quizzes, research stations,
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 Aeronautics Resources  NASA Lewis Learning Technologies Project
This section of the Learning Technologies Project at the Glenn Research Center includes guides on various aeronautic principles, activities to teach students by example, and Webbased simulations with pre and postsimulation exercises. Topics include:
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 Agora Financial for Families  Group 3  GMU EDIT 730/752
Money management articles, lesson plans, and activities for selfstudy or teaching children and tweens about using money responsibly, budgeting, spending, and saving.
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 Aha!Math  Learning.com
This K5 curriculum package, aligned to state and Common Core standards, supports differentiated instruction with multiple instructional models. Aha!Math provides students with immediate feedback in interactive story settings. Freely sample games and
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 AIMS Education Foundation
"Activities Integrating Mathematics and Science." A nonprofit, independent organization established to develop integrated math/science materials for grades K9. See, in particular, the AIMS Puzzle corner (a new puzzle each month), the AIMS@Kids Interactive
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 Ainsworth Computer Seminar  Dick Ainsworth
Sample programs, flowcharts, and hypertext illustrating how software works. Select the desired level, from a quick overview of software to a detailed look at how these programs are developed. A special section for programmers and other curious people
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 Air Pollution: A Local and Global Problem  Karen Bardeen
Students investigate the problem of air pollution in a given location and research possible solutions using a variety of tools (laboratory technology, Internet resources, multimedia technology, etc.). Mathematics goals include estimating, making, and
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 Algebra 4 All
A community of educators sharing resources and supporting one another in the practice of teaching algebra: lesson sharing, applets for students and teachers, discussion forum, blogs, media, and other content related to the functionsbased approach to
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 Algebraic Addition (SMILE)  Alex Junievicz, Kelly High School
A lesson that uses play money and IOUs to reinforce concepts around negative numbers. From the Algebra and Trigonometry section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative for Learning Enhancement.
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 The Algebraic Method  R. H. Logan
An explanation of the algebraic method, involving an algebraic relation between two or more variables with one variable expressed as a function of one of the others. Includes Algebraic Manipulation (Transformation of Variables); Continuity Principle of
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 Algebrainiac  Jessica Bogie
Blog by a Chicagoland middle school geometry and history teacher with more than a decade of experience teaching algebra and prealgebra. Posts, which date back to August, 2012, have included "#MSSunFun: Teaching Students How to Study for Assessments,"
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 Algebra PowerPoint Lessons  James Wenk
A collection of PowerPoint lessons written by a teacher and currently used in his classroom. The lessons complement McDougal Littell's Algebra 1 Concepts and Skills by Larson, Boswell, Kanold, and Stiff. Preview the slides without animation. Purchase
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 The Algebra Survival Kit  Josh Rappaport
A kit that includes a 520page handbook covering the main content areas of Algebra 1 in accordance with the NCTM Standards. Sections are tabbed, and pages are written in flash card format with questions on the front and answers on the back. Also, a poster,
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 Algorithms and Ice Cream For All (MegaMath)  Nancy Casey; Los Alamos National Laboratory
Solve a city planning problem using mathematical graphs and algorithms. Students use algebraic methods to explore, model, and describe patterns and functions involving numbers, shapes, data, and graphs in problemsolving situations and communicate the
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 Alive Maths/Maths à Vivre  Nathalie Sinclair
Handson, interactive "microworlds," in which students investigate patterns and relationships, pose questions, play with the variables, and solve problems: Play with Lulu on a grid; practice triangle reflections; play with fractions and decimal patterns
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 All About Ratios  Cynthia Lanius
Activities designed to help students understand the concept of ratios, using the Internet. Activities may also be printed out if computer access is not available. Students are expected to: use multiplication and division of whole numbers to solve problems,
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 The Amazing Abacus  ThinkQuest 1996
An exploration of the abacus. Learn to use the abacus and what it is for, and to speak and write Chinese numerals and formulas.
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 An Amazing, Space Filling, NonRegular Tetrahedron  Peg Cagle and Joyce Frost, Park City Mathematics Institute
The rhombic dodecahedron derives its name from its twelve ("dodeca") faces, all of which are congruent rhombi, each formed by joining two tetrahedra. In this article, Cagle and Frost explore these related polyhedra, showing how to exploit their space
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 AMOF: The Amazing Mathematical Object Factory  Frank Ruskey
Combinatorial objects are everywhere. How many ways are there to make change for $1 using unlimited numbers of coins of all denominations? Each way is a combinatorial object. AMOF is part encyclopedia and part calculator, a teaching tool that generates
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 Analysis & Knowledge  Sanford Aranoff
Download data analysis software, such as Patterns, which analyzes and charts trends in stock market using Andrews concepts. See also this former Rutgers University physics professor and current high school educator's thoughts on teaching and help file
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 Analyzing Numeric and Geometric Patterns of Paper Pool (iMath Investigations)  Illuminations; National Council of Teachers of Mathematics (NCTM)
An online, interactive, multimedia math investigation. The interactive paper pool game in this iMath investigation provides an opportunity for students to further develop their understanding of ratio, proportion and least common multiple. Students develop
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 Andy Norton's Web Page  Dept. of Mathematics Education, Univ. of Georgia
Illustrated essays and explorations of algebra and geometry using various technology, including TI85 calculators, CBL's and computer software such as Geometer's Sketchpad (with sketches to download), Algebra Expressor, and Excel, by a grad student in
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 Angela Andrews  District 86
Files shared during a Common Core State Standards (CCSS) Mathematics workshop by Andrews, host of the DuPage Children's Museum's Aunty Math site: Comparing Ordering Sequencing and Rounding, Dangers of Touch Math, Emergent Learner Activities, Experiences
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 The Angle Defect of a Polyhedron (Geometry and the Imagination)  Conway, Doyle, Gilman, Thurston; The Geometry Center
The angle defect at a vertex of a polygon is defined to be 2 pi minus the sum of the angles at the corners of the faces at that vertex. What is the angle sum for a polygon (in the plane) with n sides? Determine the total angle defect for each of the 5
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 Ann McCallum Books  Ann McCallum
Lessons and puzzles to extend the math fairytales and history/mystery math project books by McCallum, author of The Secret Life of Math, Rabbits, Rabbits Everywhere: A Fibonacci Sequence, and Eat Your Math Homework: Recipes for Hungry Minds. McCallum's
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 AP Calculus Stillwater  Jim Bowen
Instructional videos narrated by Bowen, who teaches calculus at Stillwater High School (OK), cover limits, derivatives, related rate problems, optimization, integrals and integration, volumes of revolution, and integration by parts.
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 Appetizers and Lessons for Math and Reason  Alan Selby
Logic Appetizers to test or or improve reading, writing and thinking skills, with definitions, concepts and proofs in many subjects (Chains of Reason; One or TwoWay Implications; Islands & Divisions of Knowledge; Deception); Advice (How to Study
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 Apples A Peel To Me (SMILE)  Olga Moreno, Horace Greeley School
A K1 lesson designed to teach students to understand real and representational graphs; to recognize some different varieties of apples; and how to gather, record and interpret data. From the Graphs and Visuals section of a collection of almost 200 single
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 Applications of Imaginary Numbers in the Real World  Bradley Chung
An exploration of typical questions about imaginary numbers, such as "Can you show me examples of imaginary numbers in the real world?" and "Are there any practical applications of imaginary numbers?" Lessons include "Mapping Imaginary to Physical"; "Complex
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 Aquí Matemàtiques (Catalán)  Carlos Romero
Web and interactive materials in Catalán designed to facilitate and improve teacher training in mathematics. Goals: to provide curricular incentives for integrating technology into primary and secondary level teaching; facilitate access to curricula;
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 ArcLessons  Environmental Systems Research Institute, Inc. (ESRI)
Lessons for using geographic information systems (GIS) in the classroom include X and Y Coordinates Rule the Map, Investigating Temperature Extremes in the USA, Baseball Radio Station Analysis, The Dust Bowl, The Great Migration, Japanese American Internment,
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 Area and Perimeter (SMILE)  Monica Starks, John Fiske Elementary
A middle school lesson on measuring and calculating the area and perimeter of squares, rectangles, triangles, etc. From the Geometry and Measurement section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative
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 Area, Arithmetic and Algebra (SMILE)  Larry Freeman, Kenwood Academy
A lesson designed to show teachers how area of rectangles and squares can motivate the learning of multiplication rules for certain binomials; how students can perform arithmetic based on these identities; and several applications of the "distributive
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