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Purplemath - Elizabeth Stapel of Western International University

Grades
8 to 12
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Secondary students can find a wealth of online algebra support on this site that provides homework guidelines, practical lessons explaining concepts at the beginning, intermediate,...more
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Secondary students can find a wealth of online algebra support on this site that provides homework guidelines, practical lessons explaining concepts at the beginning, intermediate, and advanced levels, and useful Web sites. A great resource for worksheet ideas and lesson planning.

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Illuminations - NCTM

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K to 12
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This fabulous collection of lesson plans, activities, and web links from NCTM is a professional treasury for math teachers. The two menu selections at the top, Lessons and Interactives,...more
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This fabulous collection of lesson plans, activities, and web links from NCTM is a professional treasury for math teachers. The two menu selections at the top, Lessons and Interactives, are actually drop down menus to find lessons by grade levels, Brain Teasers, Mobile Apps, a Web Sketchpad, and more. The interactives are a challenging practice for concepts ranging from basic fractions and graphing to congruence theorems. Narrow your search with keywords. Each activity includes a description and grade level recommendation. Highlighted activities and Lessons on the home page change often. Many lesson plans also include technology links, but others are low-tech or no-tech. Illuminations is created by NCTM.

In the Classroom

Keep this one in your professional favorites to find supporting technology for any math concept. As you find practice or extension ideas for student use or at home reinforcement, share specific links on your class web page or classroom computer center for students to access independently or as you assign them for needed practice. The full site is overwhelming for most parents, so share the specific areas that fit your curriculum.

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Mathematical Fiction

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9 to 12
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This rather unusual annotated list of books and stories was created for people who want to read about math from a literary perspective. Browse by topic, genre, motif, or medium. ...more
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This rather unusual annotated list of books and stories was created for people who want to read about math from a literary perspective. Browse by topic, genre, motif, or medium. These are not children's books, but serious selections for the true math nerd.

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Number Cracker - Pearson Education

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3 to 5
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Students can practice basic math skills and sequencing with this interactive activity. Type the missing number into the sequence and test your answer. Choose from three levels of difficulty....more
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Students can practice basic math skills and sequencing with this interactive activity. Type the missing number into the sequence and test your answer. Choose from three levels of difficulty.

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Eratosthenes' Sieve

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6 to 8
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This interactive chart illustrates the discovery of Greek mathematician Eratosthenes, who recognized that to find all prime numbers between two and some larger number, it is necessary...more
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This interactive chart illustrates the discovery of Greek mathematician Eratosthenes, who recognized that to find all prime numbers between two and some larger number, it is necessary to remove ALL multiples of each number between them. To watch a visual illustration of this concept, click on each consecutive number, starting with two, and watch as multiples are eliminated. Eventually, all prime numbers between 2 and 400 will be highlighted in red. Sounds complicated, but this is a fascinating site to project in the classroom as prime numbers are introduced and discussed.

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Paper Plate Education - Great Lakes Planetarium

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1 to 12
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These creative and rather offbeat hands-on activities use common paper plates and a lot of ingenuity to illustrate principles of science, math, geography, music, and more! From plate...more
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These creative and rather offbeat hands-on activities use common paper plates and a lot of ingenuity to illustrate principles of science, math, geography, music, and more! From plate tectonics (no pun intended), to multiplication practice and physical fitness, this site provides an amazing collection of ideas. Instructions are provided for most.

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Add 'Em Up - PrimaryGames.com

Grades
1 to 2
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Your youngest students can practice skills in basic addition (sums do not exceed 20) with this simple, interactive quiz. ...more
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Your youngest students can practice skills in basic addition (sums do not exceed 20) with this simple, interactive quiz.

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Changemaker - Funbrain/Pearson Education

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2 to 6
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Choose a difficulty level and a national currency (Canadian, American, Australian, British, or Mexican), then start earning money in the virtual piggy bank by calculating the correct...more
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Choose a difficulty level and a national currency (Canadian, American, Australian, British, or Mexican), then start earning money in the virtual piggy bank by calculating the correct amount of change. Questions increase in difficulty as the value of the piggy bank increases.

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Math-Kitecture

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8 to 12
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Real life applications of math are explored through a collection of activities that engage student in learning about architecture. Skills involving estimation, measurement, proportion,...more
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Real life applications of math are explored through a collection of activities that engage student in learning about architecture. Skills involving estimation, measurement, proportion, and ratios combine as students draft a "to-scale" floor plan of their classroom. The site provides sample plans, instructions on using computer software to complete the activity, and a collection of links to other Web resources on architecture and mathematics. Related activities involve finding geometric shapes in buildings, designing a bedroom, and using a virtual 3-D model of Frank Lloyd Wright's Falling Water home to estimate surface area and volume. Visit the Teacher Notes for downloadable lesson plans, ideas, and reviews of the site. Links to standards are included.

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Hypermath

Grades
8 to 12
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This is truly a unique math resource. A concept map on the home page serves as an interactive navigational system for the site which focuses on trigonometry, calculus, differential...more
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This is truly a unique math resource. A concept map on the home page serves as an interactive navigational system for the site which focuses on trigonometry, calculus, differential equations, algebra, geometry, exponents, and more. Formulas, functions, and examples stress basic mathematical principles and fundamental understanding. A great site for refreshing or reinforcing math skills.

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Curious Math - Clay Ford

Grades
7 to 12
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This is one for the math nerds among us! The fun, intrigue, and tricks of mathematics are celebrated through posting from users (registration is free). Find out how to quickly ...more
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This is one for the math nerds among us! The fun, intrigue, and tricks of mathematics are celebrated through posting from users (registration is free). Find out how to quickly square a number that ends in five, learn the roots of math words (Did you know that "zero" came from the Arabic word "zefirum," meaning "empty?"), or impress your students with the "Phone Number Trick." The site can be searched by subject.

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A+ Math

Grades
1 to 7
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Students can improve basic math skills with this fun and interactive site. In addition to a variety of games, the site offers a "make your own flashcards" feature, a homework ...more
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Students can improve basic math skills with this fun and interactive site. In addition to a variety of games, the site offers a "make your own flashcards" feature, a homework helper tool, and printable worksheets for offline practice.

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Sesame Street - Sesame Street & PBS

Grades
K to 2
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The Children's Television Network has created a delightful set of learning activities that strengthen skills in letter recognition, decoding, listening, problem-solving, and more. Led...more
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The Children's Television Network has created a delightful set of learning activities that strengthen skills in letter recognition, decoding, listening, problem-solving, and more. Led by the familiar cast of characters from Sesame Street, your youngest students will love to explore Elmo's World, the Game Room, and participate in interactive stories. The links include games, stories, art, music, mail, and Elmo's World. At the Games link you will find science activities about the weather, counting challenges, classification activities, musical fun, and numerous other educational activities. This site truly has something for all primary elementary classroom.

In the Classroom

Use this rare find to motivate your students. Have students work on individual computers and explore this site on their own. With younger students, you may want to introduce the site on an interactive whiteboard or projector. This is definitely one that you will want to share with your parents in your newsletter or on your class website.

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Play and Learn

Grades
1 to 2
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Reinforce basic literacy skills through interactive activities that involve letter and numeral writing, word recognition, color, and shape. Early elementary students will enjoy the...more
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Reinforce basic literacy skills through interactive activities that involve letter and numeral writing, word recognition, color, and shape. Early elementary students will enjoy the variety of games and activities that work best as supplements to offline instruction in the classroom or at home. Available in English, Spanish, French, and German.

In the Classroom

Though it may seem simplistic, this would make a really great resource for an ELL classroom or a basic Spanish, French or German class. Use the alphabet section as a learning center on classroom computers, allowing them to practice pronunciation and mimic what they are hearing on the site. This would be helpful for students who are auditory learners, and just need more practice with some of the basics. Make sure to include headphones on this site, insuring that students don't disturb others around them.

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Project Interactive - Shodor Education Foundation, Inc.

Grades
3 to 8
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Middle school math teachers can find a wealth of ideas for teaching number and operation conceptions, geometry, and algebra in this collection of computer-based lessons, based on NCTM...more
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Middle school math teachers can find a wealth of ideas for teaching number and operation conceptions, geometry, and algebra in this collection of computer-based lessons, based on NCTM standards. A separate section of activities and corresponding lessons are geared for students in grades 3 - 5. Each activity is accompanied by WHAT, HOW, and WHY links that provide background information, instructions, and curriculum context. The Discussion section is especially helpful. Click on a topic and read through a brief dialog that exposes common student misconceptions and presents practical ideas for introducing or explaining a concept. Be sure to visit Teacher Resources section for some useful tips on using these interactive materials with your math students.

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Math Projects

Grades
7 to 12
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Spice up your pre-algebra, algebra, or geometry classes with the tips and ideas for interactive projects found on this site. Many of the downloadable lesson plans draw connections to...more
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Spice up your pre-algebra, algebra, or geometry classes with the tips and ideas for interactive projects found on this site. Many of the downloadable lesson plans draw connections to other content areas: an ancient Greek myth is tested with the help of some modern math; track and field activities become the focus of a lesson on arc length. No answer key is provided for the math problems, so plan accordingly!

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Nrich - Cambridge University

Grades
1 to 12
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This collection of games, and articles is designed to challenge students to use their problem solving skills. Activities are organized according to UK education system levels, but click...more
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This collection of games, and articles is designed to challenge students to use their problem solving skills. Activities are organized according to UK education system levels, but click on Help for an easy conversion guide. Each problem includes a question, related pictures or diagrams, a form for students to submit their solution, and helpful hints and notes for parents and teachers. A weekly challenge is also offered. Complete the free registration to participate in a discussion forum, pose questions online, or post messages.

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Quiz Hub

Grades
1 to 12
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Students can test their core knowledge of English, French, German, math, social studies and more with this entertaining collection of interactive quizzes, puzzles and games. Click on...more
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Students can test their core knowledge of English, French, German, math, social studies and more with this entertaining collection of interactive quizzes, puzzles and games. Click on the Learning Hub and select a level (elementary, middle school, or high school) to explore age-appropriate challenges across content areas. Many of the activities on this site are free, but registration and a fee are required to access some of the special features.

In the Classroom

Use the free quizzes to help students review OR as pre-diagnositc quizzes to determine what students already know about the topic. This is a great way to assess which areas need strengthening and which areas students need less help in. Teachers wanting to focus their classrooms more efficiently will appreciate this one.

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Mighty Mouth-watering Math

Grades
4 to 8
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Chocolate can be a great motivator when learning math concepts. Use this fun and tasty activity to teach students about fractions and percentages using M&M-like candies. Students must...more
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Chocolate can be a great motivator when learning math concepts. Use this fun and tasty activity to teach students about fractions and percentages using M&M-like candies. Students must calculate the percentage of each color in a bag, and determine whether or not those percentages are the same worldwide. Tabulated results can be posted online. Suggestions for extending the activity are provided.

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Dictionary of Units

Grades
2 to 12
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This online dictionary of units of measurement is a handy resource for understanding the differences between the international system, the metric system, and U.S. system of measures....more
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This online dictionary of units of measurement is a handy resource for understanding the differences between the international system, the metric system, and U.S. system of measures. Discussions concerning conversions from one system to another are provided along with 40 different calculators (each devoted to converting units in a particular category) and a helpful downloadable pocket guide.

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