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

### Nrich - Cambridge University

1 to 12
This collection of interactive games, and articles is designed to challenge students to use their problem solving skills. Activities are organized according to UK education system levels,...more
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This collection of interactive 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. This site requires FLASH. Get it from the TeachersFirst Toolbox page.

tag(s): problem solving (294)

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### Cool Math for Kids

4 to 8
Students can practice and review skills related to basic geometry, fractions, logic, and problem solving with these fun and interactive activities. Highlights include a virtual lemonade...more
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Students can practice and review skills related to basic geometry, fractions, logic, and problem solving with these fun and interactive activities. Highlights include a virtual lemonade stand game (manage your own business to make a profit!), a collection of thought-provoking "Brain Benders," and "ArithmATTACK" - a computer driven game that challenges kids to see how many arithmetic problems they can answer in one minute.

tag(s): fractions (229), logic (244)

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### Jump Frog - Barbara Feldman

1 to 3
This interactive game challenges young students to remove all but one jumping frog from the pond by using careful planning and logic. Points are awarded each time a frog is ...more
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This interactive game challenges young students to remove all but one jumping frog from the pond by using careful planning and logic. Points are awarded each time a frog is eliminated (checkers style), and bonus points can be earned if the final frog is left sitting in the middle of the pond.

tag(s): logic (244)

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### Brain Explorer

3 to 7
If you're looking for meaningful enrichment activities in the form of challenging, yet entertaining games and puzzles, this may be just what you need. The riddles, illusions, and other...more
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If you're looking for meaningful enrichment activities in the form of challenging, yet entertaining games and puzzles, this may be just what you need. The riddles, illusions, and other mental adventures are taken from the Brain Explorer, a book written for children from age 9 to 12. Brain-bending games include Memory Solitaire, Welcome to the Third Dimension, and Jumping to Conclusions. Some are entirely "on-line interactive," while others require some effort with paper and pencil. Created by the Exploratorium.

tag(s): puzzles (204), riddles (16)

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### Protozone Interactive

2 to 9
Tap into your students' creativity and strengthen visual/spatial intelligence with this collection of web-sized interactive programs that encourage drawing, playing and exploring. ...more
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Tap into your students' creativity and strengthen visual/spatial intelligence with this collection of web-sized interactive programs that encourage drawing, playing and exploring. A free Shockwave plug-in is required and can be downloaded easily from the site. Best used with a high-speed Internet connection.

tag(s): puzzles (204)

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### Online Etch-A-Sketch - Ohio Art

K to 12
OK, this one's mostly for fun, and we're showing our age. Still, the online version of the famous drawing toy performs much as the original did. Try this one on ...more
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OK, this one's mostly for fun, and we're showing our age. Still, the online version of the famous drawing toy performs much as the original did. Try this one on your students as an example of what high tech was thirty years ago. Just don't try to clear your screen by turning it upside down and shaking it! Operate the game using the arrow keys on your keyboard.

tag(s): drawing (79)

#### In the Classroom

Have young ones practice left and right by working with a partner at classroom computers, with one partner directing "left" or "right, "up" or "down" while the other operates the keys. Together they can make a drawing! Older students will be amused by the simplicity. See what they can create with just one continuous line.

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###### More

4 to 12
This is an online tool that lets users experiment with lines, fills, and color to create their own kaleidoscope. There are lots of possible imaging, color, and mathematical connections...more
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This is an online tool that lets users experiment with lines, fills, and color to create their own kaleidoscope. There are lots of possible imaging, color, and mathematical connections that one might draw from this one. It's also just plain fun to try. This site requires FLASH. Get it from the TeachersFirst Toolbox page.

tag(s): animation (61)

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### SciZone - Ontario Science Centre

4 to 12
The Ontario Science Centre's student web page offers several collections of resources, including a set of games and puzzles done with just the right touch of student-level humor. Each...more
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The Ontario Science Centre's student web page offers several collections of resources, including a set of games and puzzles done with just the right touch of student-level humor. Each of these offers an intriguing introduction to some sort of scientific phenomenon. This would be a good site to add to your list of "exploring" sites, since it offers a broad collection of content that changes periodically.

tag(s): puzzles (204)

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### Multiflyer

4 to 8
This is a nicely done flash-based multiplication game that should be attractive to elementary students. The game's ability to offer up problems based on specific review criteria could...more
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This is a nicely done flash-based multiplication game that should be attractive to elementary students. The game's ability to offer up problems based on specific review criteria could also make this one useful for parents or teachers who want to give students a little more practice with specific numbers or number ranges. Registered users have access to additional game components and tools.

tag(s): multiplication (209), operations (122)

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### San Francisco Symphony Kids' Site - San Francisco Symphony

4 to 12
Music teachers rejoice! Here's an engaging site that explains and demonstrates music theory and performance terms in ways that will keep the attention of students from elementary through...more
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Music teachers rejoice! Here's an engaging site that explains and demonstrates music theory and performance terms in ways that will keep the attention of students from elementary through high school. This collection of Flash animations demonstrates tempo, harmonization, instrument groups, pitch, meter, and many other elements. Among all the sounds and visuals, there is also thoughtfully written text that can link the presentation to personal experience. This site requires FLASH. Get it from the TeachersFirst Toolbox page..

tag(s): rhythm (21)

#### In the Classroom

Students can use this one in class (headphones, please!) or individually. If you use a projector or interactive whiteboard to introduce the site, be sure to turn up computer speakers.

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### BrainQuest - Workman Publishing

4 to 12
Subtitled "it's OK to be smart," this site offers a collection of games, puzzles and activities designed to challenge active minds. There are also original articles, a 2-minute quiz,...more
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Subtitled "it's OK to be smart," this site offers a collection of games, puzzles and activities designed to challenge active minds. There are also original articles, a 2-minute quiz, and a post card feature.

tag(s): logic (244), quiz (84)

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### Kids' Mysteries - MysteryNet

4 to 8
Here's a page that presents a handful of mysteries that require good thinking for a solution. There's even a collection of mysteries written by kids. How many can you solve? ...more
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Here's a page that presents a handful of mysteries that require good thinking for a solution. There's even a collection of mysteries written by kids. How many can you solve?

tag(s): logic (244)

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### Play SET Online - Set Enterprises

4 to 12
Set is a challenging logic game that is often used in building reasoning skills in students. The premise is simple enough for elementary students to understand, but the applications...more
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Set is a challenging logic game that is often used in building reasoning skills in students. The premise is simple enough for elementary students to understand, but the applications can be a real challenge even for older students. This online version offers a daily sample to challenge students.

tag(s): logic (244)

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### More Brain Teasers - Hoagies

1 to 12
A creative collection of puzzles and brainteasers to challenge gifted students. This large collection is maintained by Hoagies and sometimes has a few dead links, but the collection...more
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A creative collection of puzzles and brainteasers to challenge gifted students. This large collection is maintained by Hoagies and sometimes has a few dead links, but the collection is still worth visiting for the MANY good sites they share.

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### KidsPsych

1 to 4
There's more to this one than meets the eye. This site offers a set of interesting Flash games for children age 2 to 9, along with descriptions of how each ...more
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There's more to this one than meets the eye. This site offers a set of interesting Flash games for children age 2 to 9, along with descriptions of how each game tests and develops logic or thinking skills.

tag(s): logic (244)

#### In the Classroom

Early childhood or primary teachers may find them useful for "computer time."

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### ChessKids

4 to 12
This site promotes chess, school chess clubs, and chess competitions. It offers free templates and other materials which can simplify running a chess club. There are instructional sections...more
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This site promotes chess, school chess clubs, and chess competitions. It offers free templates and other materials which can simplify running a chess club. There are instructional sections as well with a new curriculum aligned with Common Core State Standards (CCSS), but the focus is on getting students involved with the game.

tag(s): chess (2)

#### In the Classroom

Use the free sample curriculum to help develop student's cognitive development and critical thinking skills. Download the first version of the curriculum (for free) that is not aligned to the CCSS, but does follow Bloom's Taxonomy and Higher Order Thinking Skills (HOTS).

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### Virtual Math Manipulatives - National Science Foundation

3 to 12
This is a collection of really elegant "virtual manipulatives" created with funding from the National Science Foundation. These manipulatives are Java applets, so they may take a minute...more
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This is a collection of really elegant "virtual manipulatives" created with funding from the National Science Foundation. These manipulatives are Java applets, so they may take a minute to load on a dial-up connection. They provide students with a challenging online way to reinforce math concepts in many content areas.

tag(s): logic (244), manipulatives (25), puzzles (204)

#### In the Classroom

Use this site to supplement almost any math lesson, grades pre-k through high school. Open the site on the interactive whiteboard or projector, and find the appropriate lesson aid for your classroom. This site can be used to introduce a variety of lesson plans, so be sure to explore the site previous to use.

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### AIMS Puzzle Corner - AIMS Education Foundation

4 to 12
Puzzles are highly motivational tools that capture the imaginations of students. To infiltrate the classroom with a vibrant brand of problem solving, this site offers a tantalizing...more
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Puzzles are highly motivational tools that capture the imaginations of students. To infiltrate the classroom with a vibrant brand of problem solving, this site offers a tantalizing educational bait-and-hook in the form of a new puzzle each month. Clearly illustrates puzzles and solutions. These ae not online interactives. The puzzles are explained in words or images on the web page. Some have downloadable pdf printables, as well.

#### In the Classroom

Definitely include this one on your teacher web page for your bright but bored kids to challenge themselves both in and outside of class. Teachers of gifted will enjoy the varied levels available.

Use a puzzle as a "warm-up" at the start of math class every Monday to get the neurons connecting!

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### The Rube Goldberg Site - Rube Goldberg, Inc.

4 to 8
This fun site offers a retrospective on Rube Goldberg's wacky inventions and includes examples of how present-day engineering students devise 20-step ways of accomplishing simple tasks....more
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This fun site offers a retrospective on Rube Goldberg's wacky inventions and includes examples of how present-day engineering students devise 20-step ways of accomplishing simple tasks. The site is a great "idea site" for students getting used to invention and problem solving.

tag(s): puzzles (204)

#### In the Classroom

Review the invention pictures included on this site on a projector or whiteboard as an activator activity for an inventions unit. Have students draw or design their own machine for performing a similar every-day task.

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### Questacon: The Scilands - Questacon

4 to 12
This collection - part of an extensive site from Australia's Questacon museum - includes lots of optical illusions and deceptively simple puzzles designed to challenge perceptual abilities,...more
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This collection - part of an extensive site from Australia's Questacon museum - includes lots of optical illusions and deceptively simple puzzles designed to challenge perceptual abilities, logic, and higher-order thinking skills. It's a great place to send that student who's always ready for the next challenge.

tag(s): puzzles (204)

#### In the Classroom

Include this site on your teacher web page for students to access outside of class when they are looking for an extra mind-bending challenge. Also consider sharing this site with your teaching colleagues who work with gifted students.