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## 406 mind-stretchers results | sort by: Most Recent First Alphabetical Most Viewed First

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4 to 12
This unusual website shares the "uniqueness" of a multitude of numbers. The numbers range from 0 - 9,999. This website teaches you what the only even prime number is, what ...more
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This unusual website shares the "uniqueness" of a multitude of numbers. The numbers range from 0 - 9,999. This website teaches you what the only even prime number is, what a narcissistic number is, what the smallest number with 14 divisors is, and a LOT of other interesting mind-stretching information. The highlight of this website is the ability to click on math terms to learn more about the topic.

tag(s): angles (87), median (24), numbers (191), roman numerals (9), vocabulary (315)

#### In the Classroom

This is one of those sites that you have see to appreciate. Share the site on an interactive whiteboard. In more advanced classes, project a number on the screen as students walk in. Have students try to figure out what might make this number "special." Have students share their responses. This is a great "number of the day/mind-stretcher of the day" activity.

Or have students work on individual computers. Choose several of the numbers that relate to a topic that you are teaching (such as the square root), and have individual students learn about the number and then teach the class what they learned. Extend the idea by having students create "what's special" PowerPoint slides or wiki pages about favorite numbers. What better way to develop true number sense and excitement about math as a mental game.

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### Sheppard Software - Brain Games - Sheppard Software

2 to 8

Brain Games offers a collection of over thirty interactive logic games, puzzles, music games, and more. Some specific topics include code breaking, coins, arithmetic, music notes, word...more
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Brain Games offers a collection of over thirty interactive logic games, puzzles, music games, and more. Some specific topics include code breaking, coins, arithmetic, music notes, word scramble, and many others. There is even a card game version similar to "24." All of the activities require Flash. You can get it from the TeachersFirst Toolbox page.

tag(s): logic (246), puzzles (205), sudoku (16)

#### In the Classroom

Introduce the website (or a specific activity) on an interactive whiteboard and then have students work in pairs to "try their hands" at the many activities. This website is perfect for gifted students looking for an extra challenge. This is a great link to provide to parents in a class newsletter or on your class website.

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### Paper Models of Polyhedra - Gijs Korthals Altes

6 to 10
This simple, "hands-on" website offers PDF files of numerous paper models of polyhedra. The files are ready to print and share with your students. The various geometric solids include...more
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This simple, "hands-on" website offers PDF files of numerous paper models of polyhedra. The files are ready to print and share with your students. The various geometric solids include platonic solids, Archimedean solids, Kepler-Poinsot polyhedra, and numerous others. The files are available in PDF format and require Adobe. Get it from the TeachersFirst Toolbox page..

tag(s): paper folding (4), visual thinking (10)

#### In the Classroom

Why not print a pattern onto cardstock or other thick paper. Then project the image (that you printed for your students) onto a projection screen or interactive whiteboard, while students work independently at their seats. Before you pass out the paper copies, have them view the projected image and predict what it will be.

These shapes can also serve as creative study aids for all subject areas, especially for students who need engaging ways to review. Have students write key terms and questions on the "faces" before assembling the figures, then "roll" them as a study game, testing each other to define or explain terms.

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### Ocean Challenge Puzzle - National Oceanic and Atmospheric Administration

5 to 9

This unusual website is set up like a tile puzzle. The unique aspect of this website is that students work as an online team to complete the tile puzzle together. ...more
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This unusual website is set up like a tile puzzle. The unique aspect of this website is that students work as an online team to complete the tile puzzle together. There could be 50 students from around the world working on the same puzzle, without ever communicating. Students click on any of the tiles to answer a question pertaining to the ocean, salt water, or freshwater. If they provide the correct answer, that tile is removed to reveal a piece of the picture. Hints are provided, and second changes are given. The goal of the activity is to move the tiles to reveal the "ocean" picture beneath the surface of the tiles. New puzzles appear frequently (as the puzzles are completed). This website also provides lesson plans relating to the ocean for grades 6-12. The lesson plans correlate with national science standards. You can find the lesson plans by clicking on the Education link. This activity requires FLASH. The lesson plans require Adobe Acrobat. You can get both from the TeachersFirst Toolbox page..

tag(s): animals (319), marine biology (36), oceans (164), water (132)

#### In the Classroom

Ideas abound for this motivating website! How about having your students work on individual computers and see how many tiles the class can "move" while working together. Or if individual computers aren't available, this website makes an excellent learning station or group activity using an interactive whiteboard (or projector). Use it as a thirty-second class starter during every day of your Oceans unit. Be aware - this activity is addicting! Your students may be begging to do this activity on a daily basis.

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### Copse and Robbers - ARKive Education

3 to 8

This fabulous activity motivates students to use their investigative skills to solve a "kid-friendly" murder case and learn scientific inquiry skills in the process. The "victim" is...more
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This fabulous activity motivates students to use their investigative skills to solve a "kid-friendly" murder case and learn scientific inquiry skills in the process. The "victim" is a wood pigeon. Students must search the crime scene for clues. Then students go to the lab to analyze the clues. Much scientific information and hypothesis testing is imbedded into this activity. This activity requires FLASH. You can get it from the TeachersFirst Toolbox page..

tag(s): forensics (26), inquiry (32)

#### In the Classroom

Visit the Instructions links for details about how to use this program. Use your interactive whiteboard to make this mystery a class challenge. Or use this website as a cooperative learning center. Have students "team-up" into investigative groups. See how many teams can identify the correct culprit. This is a wonderful site to get your students excited about science class.

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### Grain Strain - sciencemuseum

4 to 10

This interactive website challenges students to design a contraption that will catch 50 pieces of grain. There is a chain that drops the grain, and a bucket at the bottom ...more
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This interactive website challenges students to design a contraption that will catch 50 pieces of grain. There is a chain that drops the grain, and a bucket at the bottom of the screen. Students have their choice of 5-6 chains running in various directions. What a fabulous way to integrate science, math, creativity, and problem solving. This site requires FLASH. Get it from the TeachersFirst Toolbox page. NOTE: this British science museum is very popular. The site opens slowly at certain times of the school day and evening in Britain.

tag(s): logic (246), machines (26), simple machines (35)

#### In the Classroom

This is a wonderful website to incorporate into a science unit about levers, gears, and simple machines. Or use this website as a mind stretcher for the entire class.

Share this creative website on an interactive whiteboard (or projector). Be sure to turn up the volume, students will enjoy the background music and sounds provided at this website.(You may end up turning it OFF after a while, too!). Or have students work in pairs on laptops to solve a level and analyze their success, including drawing and labeling the parts of their machine.

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### National Library of Virtual Manipulatives - Utah State University

K to 12
This celebrated collection of countless interactive math activities was created by Utah State University. Use the simple grid to find activities by grade level (pre-K-2, 3-5, 6-8, and...more
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This celebrated collection of countless interactive math activities was created by Utah State University. Use the simple grid to find activities by grade level (pre-K-2, 3-5, 6-8, and 9-12)and topic: numbers & operations, algebra, geometry, measurement, and data analysis & probability. Specific virtual manipulatives include attribute blocks, geoboards, pattern blocks, algebra tiles, and numerous others. Nearly all of the activities require JAVA. Get it from the TeachersFirst Toolbox page..

tag(s): charts and graphs (197), probability (135), tangrams (13)

#### In the Classroom

What a perfect tool to help your visual learners connect the dots in math class. All activities are perfect for an interactive whiteboard or projector. This is also an excellent resource to use for re-teaching skills, additional practice, enrichment activities, or even advanced activities for your gifted students. Learning support teachers will appreciate the alternative way to present math topics in a "hands-on" format. Be sure to include this website as a link on your classroom web page.

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### Geometry - 3D Shapes - Annenberg Media

5 to 9

This website offers motivational and interactive class activities to learn more about 3D shapes. It also shows how to calculate surface area and volume, as well as other mathematical...more
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This website offers motivational and interactive class activities to learn more about 3D shapes. It also shows how to calculate surface area and volume, as well as other mathematical properties about the 3D shapes. Specific topics include surface area and volume, platonic solids, Euler's Theorem, and several others. The Test Your Skills link provides an interactive quiz complete with photos, illustrations, and animations. The About This Interactive link provides standards, goals, lesson ideas, and more. Some of the activities require FLASH. You can get it from the TeachersFirst Toolbox page..

tag(s): area (71), volume (53)

#### In the Classroom

Get your interactive whiteboards (or projectors) ready for this intriguing website. The website introduction page activates students' schema by explaining how we live in a three-dimensional world. Have your students add to the website's list of 3D shapes in their classroom. Complete the web activities as a class (on a projection screen), or have your students team up and research the website in pairs. At the conclusion of the activity, have your students divide into two teams to complete the interactive quiz. Project the questions on the screen, and have the teams discuss the math problem and determine the best answers.

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### Count On! - Tribal Group

3 to 9

What a fabulous math website! The homepage features numerous interactive math activities (updated frequently). There are also links to countless math activities (mostly interactive),...more
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What a fabulous math website! The homepage features numerous interactive math activities (updated frequently). There are also links to countless math activities (mostly interactive), professional information about the teaching of math, and much more. Some examples of the topics include 3D geometry, time, money, Sudoku, weight and measurement, numbers, probability, Tangrams, and numerous others. This British site provides benchmarks and standards. Some of the activities require FLASH. You can get it from the TeachersFirst Toolbox page.. NOTE: the site is slow to open during heavy-traffic times. Please be patient.

tag(s): factors (40), money (184), numbers (191), probability (135), sudoku (16), time (139)

#### In the Classroom

This site is an excellent resource for educational activities both in and out of the classroom. Be sure to visit the "Games" link. There you will find numerous educational math activities that are ready for your interactive whiteboards or projection screens. Share the link on your teacher web page for parents and students to access from home, as well.

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### Johnnie's Math Page Fun

K to 8

This collection of over fifty interactive math activities was organized by a math specialist (former 5th grade teacher). Difficulty levels are color-coded for "Primary Math," "Best...more
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This collection of over fifty interactive math activities was organized by a math specialist (former 5th grade teacher). Difficulty levels are color-coded for "Primary Math," "Best Primary Math," "Intermediate Math," and "Best Intermediate Math." The activities include basic math and logic activities. Some of the topics include Hanoi towers, weights, Tetris, algebra, abacus, point of view, and countless others. What a fabulous resource for any elementary or middle school math class. All of the activities are interactive and require FLASH or JAVA. You can get both from the TeachersFirst Toolbox page..

tag(s): counting (110), patterns (87), symmetry (51), tangrams (13)

#### In the Classroom

What a fantastic website to include in your classroom web page and newsletter. All of these activities are perfect for an interactive whiteboard or projector. This is an excellent resource for gifted students. The activities could also be used for enrichment, additional practice, and re-teaching skills. So turn up the volume and treat your class to a mind-bending challenge.

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### Statistics - Johnnie's Math Page

2 to 8
This phenomenal collection of interactive statistics activities was organized by a math specialist (a former 5th grade teacher). There are about seven activities provided. Specific...more
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This phenomenal collection of interactive statistics activities was organized by a math specialist (a former 5th grade teacher). There are about seven activities provided. Specific topics of interest include a few graph maker activities, pie charts, mean and median, and spinners. All of the activities are interactive and require FLASH or JAVA. You can get both from the TeachersFirst Toolbox page..

tag(s): charts and graphs (197), mean (27), median (24), statistics (125)

#### In the Classroom

Use an interactive whiteboard and make the activities a class challenge. The activities at this website offer a "ready to go" learning center. Or these web activities would be perfect for individual practice on laptops or in the computer lab.

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### Probability - Johnnie's Math Page

4 to 8
This website includes four interactive web activities that were organized by a math specialist (and former 5th grade teacher). The specific topics include spinners, dice, and dice tallying....more
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This website includes four interactive web activities that were organized by a math specialist (and former 5th grade teacher). The specific topics include spinners, dice, and dice tallying. All of the activities are interactive and require FLASH or JAVA. You can get both from the TeachersFirst Toolbox page..

tag(s): probability (135)

#### In the Classroom

This is a "ready to go" learning center. Use the interactive spinners and dice for student-created games or teacher-created review games in any subject. Or better yet, have students work independently on laptops or in the computer lab.

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### Geometry - Johnnie's Math Page

2 to 8

This fantastic collection of links was organized by a math specialist (a former 5th grade teacher). The site provides over forty interactive math activities that all relate to geometry....more
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This fantastic collection of links was organized by a math specialist (a former 5th grade teacher). The site provides over forty interactive math activities that all relate to geometry. Some of the specific topics include pattern blocks, square tiles, pentominoes, geoboards, symmetry, tangrams, triangles, angle measures, polyhedra, cartesian grids, tessellations, point of view, and numerous other topics. What a wonderful resource to use with elementary or middle school math students. All of the activities require FLASH or JAVA. Get both from the TeachersFirst Toolbox page..

tag(s): angles (87), symmetry (51), tangrams (13)

#### In the Classroom

This website provides excellent resources to use for additional practice, re-teaching skills, enrichment activities, or even advanced activities for your gifted students. All of the math activities are perfect for an interactive whiteboard (or projector). Treat your class to these fabulous resources.

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### The x plus y files - Issue 11 - Symmetry +

3 to 12
This issue of "x plus y" offers math teachers some intriguing ideas and activities to incorporate into class lessons at all levels. There are challenging logic puzzles, but also some...more
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This issue of "x plus y" offers math teachers some intriguing ideas and activities to incorporate into class lessons at all levels. There are challenging logic puzzles, but also some basic math activities and information. For example, the site offers "multiple tricks" that provide easy methods for students to figure out the multiples of 7, 9, etc. There are eight specific activities provided including: Mathletics, An Open and Shut Case Concluded, Puzzling Scales, Guard Duty, Multiple Tricks, Alphanumeric, Squares and Quadrilaterals, and Shepherd's Problem.

tag(s): logic (246), mental math (27), multiples (30), number sense (94)

#### In the Classroom

These activities are all ideal for a projection screen. Why not display one of the activities on a large screen as a brain stretcher activity at the beginning of class. If you are working on building mental math skills, some of the tips for teaching multiples will be handy. Why not ask the students to make posters with the tricks.

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### Fill-It-In Outline Mathematics - Alexander Bogomolny

1 to 10
This website is truly a rare find - combining math and reading skills. Although the main page is aesthetically plain, the activities are very challenging. Most are set-up as word ...more
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This website is truly a rare find - combining math and reading skills. Although the main page is aesthetically plain, the activities are very challenging. Most are set-up as word problems that require reading, comprehension, math skills, and more. The "outline math problems" provide students with 3-5 choices. You simply click on the blank and the choices for the answers are provided. There are activities for primary grades (such as basic addition practice) as well as advanced activities for secondary grades (such as geometry concepts). Many of the activities require JAVA. Get it from the TeachersFirst Toolbox page..

tag(s): angles (87), logic (246), multiples (30)

#### In the Classroom

These activities are perfect for an interactive whiteboard (or projector). You could also provide a link to this website in your class newsletter or on your class web page. Many of the activities would provide excellent at-home practice and/or enrichment. Challenge your students to answer a question of the week for extra credit.

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### Planet Science - NESTA

K to 12

This MUST SEE interactive science website features eight specific areas. The "News" section includes weekly news updates and features. "Wired" has challenging interactive games for...more
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This MUST SEE interactive science website features eight specific areas. The "News" section includes weekly news updates and features. "Wired" has challenging interactive games for grades 4-12. "Sci-Teach" provides countless resources for teachers of all grades. "Out There" takes you to the "back garden of science delights," including inventors, sound, vampires, and the flu. "Parents" has useful ideas - even science experiments for children's parties. "Under 11s" is geared for younger students, an excellent collection!. The activities teach traditional science topics using new multimedia. The "Next Steps" link challenges students to think about their future careers (both science and non-science). There are printable pages and interactive activities for elementary, middle, and high school students. The "Library" link features countless online science resources.

Nearly every one of the activities requires FLASH. Get it from the TeachersFirst Toolbox page..

tag(s): inventors and inventions (85), planets (131), sports (97), water (132)

#### In the Classroom

Nearly all of the activities are ideal for interactive whiteboards (or projectors). This site is so rich it may be overwhelming. If you are an elementary teacher, start at the "Under 11s" link. Otherwise, visit the "Sci-Teach" link first for some excellent ideas, resources, and science fun. Preview this site before starting any science unit to find related activites and extensions.

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### Math Teasers - NCES

5 to 12
This site offers a monthly math brain teaser problem to test your math/statistical knowledge. Solutions to the questions are hidden behind a clickable bar so you can share the question...more
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This site offers a monthly math brain teaser problem to test your math/statistical knowledge. Solutions to the questions are hidden behind a clickable bar so you can share the question on a projector without revealing the answer. Previous math teasers and solutions can be found in the archives.

tag(s): brain (65), statistics (125)

#### In the Classroom

Be sure to include this site on your teacher web page for students to access both in and outside of class. Use the challenge as an extra credit opportunity or a prompt for "math blogging."

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### Mystery Net's Kids Mystery - MysteryNet: The Online Mystery Network

4 to 9

If solving a good mystery is what your students crave, then this website is worthy of bookmarking. There are 28 'quick solve' mystery stories provided. Students read the story, and...more
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If solving a good mystery is what your students crave, then this website is worthy of bookmarking. There are 28 'quick solve' mystery stories provided. Students read the story, and then choose the perpetrator. Clues are provided as necessary. This website also features 29 chiller mystery stories to solve. At the bottom of the screen, you will find links to lesson plans (about mysteries), mystery bibliographies, a "tricks" page, and much more.

tag(s): forensics (26)

#### In the Classroom

Reading teachers in the elementary and middle grades will appreciate the complicated story line at a lower reading level. Students will be motivated to read more of the stories.

Why not display the mystery on an interactive whiteboard (or projection screen) as an anticipatory set for a science class on forensics, reading lesson about "finding clues," or a mystery unit. Use the tools to highlight clue words and other ways that the mystery "leads" you to the solution. Challenge your class to create their own 'quick solve' mysteries individually or with a partner on a class wiki. If your teaching assignment allows you to team teach, coordinate your mysteries in reading class with a look at scientific method in science class, using these mysteries.

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### Cracker - sciencemuseum

3 to 8

An addictive logic challenge, this site asks student to "crack the code" to break into a security system at the Science Museum. Students use a telephone keypad to enter possible ...more
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An addictive logic challenge, this site asks student to "crack the code" to break into a security system at the Science Museum. Students use a telephone keypad to enter possible codes (4-digits). The challenge is somewhat similar with the board game Mastermind. Students are given six attempts to try to "crack the code" before an alarm goes off. After each attempt, students are provided with feedback about which numbers were correct. Dark green numbers represent numbers that are in the code, but in the wrong position. Light green numbers represent numbers that are in the code, and in the correct position. This site requires FLASH. Get it from the TeachersFirst Toolbox page..

tag(s): logic (246)

#### In the Classroom

What an excellent activity to practice logic and deduction skills! Students will love the challenge of trying to "crack the code". Science teachers trying to introduce hypothesis testing can use model this activity on an interactive whiteboard to demonstrate the process. This would then make an ideal cooperative learning activity for students to try in small groups. Elementary gifted students would also enjoy the challenges that this website provides.

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### Launchball - sciencemuseum

3 to 12

Beware - your students may get addicted to this science activity! Launchball challenges students to use batteries, solar power, magnets, and other types of virtual energy to move a...more
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Beware - your students may get addicted to this science activity! Launchball challenges students to use batteries, solar power, magnets, and other types of virtual energy to move a ball from a starting point to an ending point. There are numerous levels (up to 30). The program also offers hints and provides science facts throughout the activity. This mind stretcher allows students to play the game of virtual physics or create and share their own Launchball game. Users are able to sign-in and receive a password (free of charge). This allows users to return to the same game and save their conquests. This site requires FLASH. Get it from the TeachersFirst Toolbox page..

tag(s): electricity (92), energy (208)

#### In the Classroom

Introduce your students to this unique, mind-stretching activity using an interactive whiteboard. Then allow your students to work individually or in groups to navigate the activities and eventually create their own Launchball games to challenge classmates. What an exciting way to learn about energy! Use a single class log-in for safety's sake and to monitor student appropriateness, if necessary.