 Growing Exponentially  Heather Kohn
Blog of "reflections on teaching math and striving to do better each day than the last." Posts, which date back to August, 2012, have included "Olympic Fever," "Work in your head, Points in my head," "Graphing Calculator Activities," "Absolute Value Project,"
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 Growth Creature Lab  Mike Riedy
This lab ties the growth of creatures into the Fundamental Theorem of Similarity and extends it to logistic growth. The lab shows students how to collect data from the growing creatures and how the data apply to geometry. Sections of the lesson include:
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 Han5 System of Mathematics  Tapp Hancock
A system for teaching number patterns on one hand. Includes workbooks, testimonials, video coverage, lesson plans, and more. Han5 Math is a California Stateapproved supplement. Also available at http://www.han5.com/ .
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 The Handley Math Page  John Handley High School Mathematics Department
David Pleacher posted Problems of the Week in his classroom every week since 1968, and posted them online  with solutions and names of students who correctly solved them  from 1998 until his retirement in 2006. See also his lesson plans and worksheets,
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 Hands Across America (TEAMS)  Jeannie Toshima; TEAMS Distance Learning, Los Angeles County Office of Education
How far can we get across the United States if we all join hands and measure the length of the line? In 199495 7,164 participants yielded a total of 19,546.22 feet. Your students might want to put the information into a database, creating fields to compare
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 Hands on Banking  Wells Fargo Bank NA
Selfpaced financial literacy lessons on budgeting, savings and checking, credit, investing, and more. Kids learn with space aliens Zing and Zoey; teens, with characters Angie and Alex; young adults, with live action age cohorts. This initiative of Wells
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 Handson Math: Activities for the Elementary Classroom  Janine Parker
Lesson plans for children in grades one through six about topology, number patterns, and geometry. Handouts for each lesson may be downloaded in PostScript form or as GIF files, and a zipped DOS program to display Platonic solids, Archimedean solids,
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 HandsOn Universe (HOU)  Lawrence Berkeley National Laboratory
An education program that helps high school students perform astronomical research in the classroom. Students around the world can request observations from an automated telescope, download images from a large image archive, and and analyze them with
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 Harnessing Technology to Serve Adult Literacy: Math  David J. Rosen
Frequently Asked Questions on how to help adult literacy education (ABE/GED/ESL/ESOL) teachers and learners use computers, television, audio and video cassettes, and other electronic technology to solve learning and instructional problems: "Our students
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 Harry O'Malley
Blog by a math teacher who believes "... that learning to use mathematics changes people's lives in profound and valuable ways," and describes himself as "obsessed with making that happen for people. I am convinced that recent advancements in technology
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 Having Fun working With Fractions (SMILE)  Brian Cagle, John W. Cook School
A lesson for elementary students designed to model addition and subtraction by shading parts of regions; divide a word into appropriate fractional parts; pay attention to details in instruction relating to "first," " last," "second," etc.; analyze clues
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 HCPSS Family Mathematics Support Center  Howard County Public Schools
K12 math lessons, activities, enrichment tasks, vocabulary lists, and more, organized by grade level and academic quarter. Designed for parent and students, the Maryland school district collected these resources from third parties such as LearnZillion,
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 Helping Your Child Learn Math  U.S. Dept of Education
A second, revised edition of Helping Your Child Learn Math for parents of children in kindergarten through fifth grade. The book includes a variety of activities that will help children learn and apply mathematical concepts such as geometry, algebra,
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 H.E.L.P. Program  Digital Directions International Inc.
Teaching math to English Language Learners (ELL), and Spanishspeaking students in particular, this internetbased, supplementary curriculum removes language barriers from the learning of math skills and math content via interactive lessons. Learn about
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 The Hermit's Epidemic (MSTE)  Jay Hill; University of Illinois at UrbanaChampaign (UIUC)
A project that tracks the spread of a disease on a desert island populated by hermits, using the Internet and other student activities to explore the concept of expected value: How many hermits do we expect to get the disease? A model using dice and an
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 Heron's Calculation of Triangle Area (MSTE)  James P. Dildine; University of Illinois at UrbanaChampaign (UIUC)
The area of a triangle can be calculated using a formula attributed to Heron of Alexandria. This calculation requires that the lengths of all three sides be known. This activity includes an Excel file to calculate the area of a triangle, and Java and
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 Highland Tessellations  Karen M. Stagge, Highland Middle School, Libertyville, IL
Tessellations A La Escher: an introductory unit based on MECC's Tesselmania! software and the graphics of M.C. Escher, to help students realize the importance of mathematics in the art world. Also links to work done by students at other schools.
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 Highline Advanced Math Program  Don and Jerre McQuinn; Highline Council PTSA, Seattle, WA
A math enrichment program for students in grades 57. Lessons (first and second year) and a homework helper; Math Quizzer; definitions, and unit conversions. Also practice quizzes for the Olympiads.
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 High School Financial Planning Program  National Endowment for Financial Education (NEFE)
A sixunit program that provides teens with a greater understanding of and ability to manage their personal finances in the areas of goal setting, budgeting, and saving. With games, simulations, case studies, and interactive exercises, the site provides
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 High School Math Lessons  Joe Mercer
Lessons, worksheets, quizzes, and tests for high school algebra 1, algebra 2, geometry, precalculus, and AP Calculus AB written by a retired math teacher. Some of the resources, composed in SoftChalk's LessonBuilder, include Flash animations or download
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 High School Notebooks  George Beck; MathSource
High school Mathematica notebooks in two different styles, for teachers to use either directly or as examples of what they might want to imitate or avoid. One style has little explanation and is meant to encourage the student to experiment with the functions
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 High School Operations Research
Modules consisting of one or two student activity worksheets (46 pages) in which students discover mathematical concepts while solving a scaleddown problem set in a context they can relate to. In addition each module contains twenty to thirty pages
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 High School Projects (COMAP)  Consortium for Mathematics and Its Applications
Products developed in print, video, and multimedia formats, supporting the NCTM Standards, to bring mathematical modeling into high schools around the country, and present mathematics in contexts that are relevant to students. Curriculum: Mathematics:
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 HillsdaleLenaweeMonroe Math and Science Center
From eastern Michigan, USA. Interactive sessions and information on water studies for high schools, including data collection on frogs and toads, a virtual marsh tour, water quality studies, TI calculator programs, and links to math/science sites.
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 H.I.P. Pocket Change  United States Mint
The History In Your Pocket (H.I.P.) Pocket Change site showcases the connection between this country's coins and its people. Through games, stories, and other engaging activities, the site highlights both the individuals who appear on U.S. coinage and
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 History Of Our Solar System on a Time Line (SMILE)  Richard Murray, Gage Park High School
A lesson designed to teach students how to use ratios to make scale models. From the Graphs and Visuals section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative for Learning Enhancement.
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 A Homepage for New Math Teachers  Terri Husted
A page created by a middle school teacher to give new math teachers a few pointers and ideas to help with their teaching, focusing on "the qualities of good teachers and not just good programs." Includes: How to Start Making Connections; A Clear Lesson;
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 Homeschool Math
Free resources for homeschool math teaching: worksheet generator, curriculum corner, math textbook for grades 15, teaching tips, and a resource link list emphasizing interactive content and games.
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 Honeycomb Hotel: A Unit in Logic  Barbara De Roes
A lesson plan for grades 512+, for teaching deductive logic, using puzzles not dependent upon language. "Honeycomb Hotel is a game of logic and deduction.
You must determine which symbols are on which doors of the Honeycomb Hotel, and the exact path
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 HOT Math  Pauline Vos
Handson tasks in the mathematics classroom, a resource site for teachers of students around 14 years of age. Among the topics are angles, symmetry, scale drawing, balance algebra, tables, combinations, statistics, probability, reasoning, finding rules
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 HOTmaths  HOTmaths Pty Ltd
HOTMaths' interactive online math learning and teaching resources include interactive activities, a math dictionary, and Scorcher, an online basic mental arithmetic skillsbuilding competition. All content aligns with Australia's early secondary school
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 Houston Area RealTime Traffic Report  Susan Boone
Students calculate the time needed to travel a certain distance given the rate of speed with data collected using "realtime" traffic maps of the greater Houston area. Over a period of one week, one month, and one school year, traffic patterns are studied
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 How Divine Is My Proportion? (SMILE)  Edwina R. Justice, Gunsaulus Scholastic Academy
A lesson for grade 8 that relates the ratio of successive numbers in the Fibonacci Sequence to the "divine proportion" and compares approximate golden rectangles to human body proportions. From the Arithmetic section of a collection of almost 200 single
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 How do You Stack Up? Revisited (SMILE)  Robert Foote, Walt Disney Magnet School
A lesson designed to teach students to estimate the number of pennies, nickels, dimes and quarters in plastic bags; build stacks of each type of coin; find the thickness of a penny, nickel, dime and quarter after measuring their stacks; measure to the
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 How Many Games Does it Take to Win the World Series? (MSTE)  Jay Hill; University of Illinois at UrbanaChampaign (UIUC)
A project that uses the Internet and other student activities to explore the concept of expected value: How many games do we expect the World Series to last? A coinflipping model and an analytic solution are provided.
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 How Many Regular Polyhedrons Are There In This or Any Universe? (SMILE)  Lawrence E. Freeman, Kenwood Academy
A lesson designed to teach the idea of "regularity" in geometry, exploring regular polygons and polyhedra. From the Geometry and Measurement section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative for Learning
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 How Much is a Million? (SMILE)  Sharon Simmons, Joseph Stockton Elementary School
A lesson for grades 78 designed to teach students to estimate how much a
million of something weighs. From the Recreational and Creative Math section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative for
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 How To Add Without Using Fingers  James Kent Murray
Teacher guide and student workbooks, designed to help students add faster and more accurately.
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 How to estimate Saturn's Mass and Distance.  Christensen, Winther
An EAAE/AOL student project entered in the Danish Young Scientist Competition. Students apply simple math to measure the distance to Saturn, the diameter of the planet and its ring system, and its mass.
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 How to Knit a Moebius Band (Geometry and the Imagination)  Conway, Doyle, Gilman, Thurston; The Geometry Center
Directions for using two colors to knit a band that can be cut apart into a Moebius strip, expanded by Maria IanoFletcher from an original recipe by Miles Reid.
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 How To Measure Area (SMILE)  Levi Johnson, James Otis
A 7th grade lesson designed to help students gain an understanding of square units. From the Geometry and Measurement section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative for Learning Enhancement.
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 How to Use an Abacus (SMILE)  William Gordon, John Hope Academy
A lesson designed to demonstrate the properties and operations of a number system; develop an understanding of the commutative, associative and distributive properties of the mechanics of the abacus; and to help students understand the place value of
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 The Huexotzinco Codex  Library of Congress
In this lesson, students analyze a set of pictograph documents created by native peoples of Puebla, Mexico in 1531. Then they take on the role of historians, studying the documents, decoding images, tabulating quantities of goods paid to the local government,
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 Hydroponics Project Page  Holtz, Cooper; Levering School, Philadelphia, PA
A project plan for a seventh grade class that involves growing different hydroponic gardens and measuring and graphing the results. Included on this site are: project summary reports, pictures of the kids and the gardens, results chart, movie, standards
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 Hyperbolic Geometry (Geometry and the Imagination)  Conway, Doyle, Gilman, Thurston; The Geometry Center
A closed polyhedron cannot be made by snapping together seven equilateral triangles so that there are seven at every vertex, but if you persist and continue to snap together seven triangles at each vertex, you will actually construct an approximate model
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 The Hyperbolic Surface Activity Page  Dr. Tom Holroyd
This page contains a postscript file and directions for constructing
a hyperbolic plane tesselation using paper, scissors, and tape. It
demonstrates why hexagons tile flat space, but heptagons require
curved space (and helps to introduce nonEuclidean
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 Hypermedia Textbook for Elementary School Kids (MathMol)  Sheila M. Estacio
For Grades 35. Grade 3  Water (What is Water? Solid, Liquid, Gas, Water in the Air); Grade 4  Matter and Energy (What is Matter?, States of Matter, Fun Stuff with Matter, Energy, Measuring Energy); Grade 5  Atoms and Molecules (Atoms  Elements. Compounds,
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 Hypermedia Textbook for Grades 612 (MathMol)  NYU/ACF Scientific Visualization Laboratory
Designed for middle school students, but also useful for students of high school chemistry. Introductory concepts: mass, weight, volume, density, scientific notation, our 3dimensional world, VRML, geometry quiz, the geometry of 2 and 3 dimensions, and
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 iCoachMath.com  HighPoints Learning, Inc.
iCoachMath.com coaches students online; and provides teachers with student performance reports, customized test papers, and math resources such as lesson plans aligned to state and national standards. The site freely offers an illustrated dictionary of
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 IDEA: Internet Differential Equations Activities  Thomas LoFaro; College of Sciences, Washington State Univ. (WSU)
Interdisciplinary computerbased activities for differential equations: a database of computer activities illustrating both mathematical concepts and the application of these concepts in a wide variety of disciplines. DynaSys, Java differential equations
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