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

### The Near Doubles Machine - Crick Web

3 to 8

The goal of this activity is to reach a "target number" from a starting number. Students are given a number and then have the options of doubling the number, ...more
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The goal of this activity is to reach a "target number" from a starting number. Students are given a number and then have the options of doubling the number, dividing the number by 2, adding 3 or subtracting 5. Develop number sense and multiplication/division skills. This is a more difficult version of the game "Crazy Counter". Flash is required.

tag(s): addition (224), division (159), multiplication (209), subtraction (186), vision (79)

#### In the Classroom

This is an excellent mind-stretching activity for group or independent challenges. Use it as a warm-up on an interactive whiteboard or projector before any math lesson or as reinforcement during a unit on multiplication or division. This is a definite link for your teacher web page. You will develop number addicts!

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### Leapfrog

3 to 8
This logic game asks students to move six frogs (3-blue and 3-green). This is a lot more difficult than it may appear. The rules include: each color frog ...more
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This logic game asks students to move six frogs (3-blue and 3-green). This is a lot more difficult than it may appear. The rules include: each color frog may only move in one direction and frogs may move one space or jump over one frog. The students are asked to investigate the game by answering a few specific questions. Younger children will need teacher direction. This game requires Flash.

#### In the Classroom

There is no explanation or solution provided, so you may want to visit this site for a few minutes before including your class to familiarize yourself with the activity. This is a good activity to develop multi-step planning and envisioning strategies. Use it as an interactve whiteboard warm-up to get your class thinking and forming hypotheses.

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### Brookfield Zoo: In Search of The Ways of Knowing Trail - Brookfield Zoo

3 to 8

This animated site is amazing! The entire site is a journey throughout the African forest. Along the way, students have four African children offering advice. Their parents ...more
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This animated site is amazing! The entire site is a journey throughout the African forest. Along the way, students have four African children offering advice. Their parents include a researcher, forest ranger, farmer and more! The African characters' expertise helps the student to choose which way to go next. The site includes a forest fact book, information about African animals and forests. A special asset of this unique site is that it incorporates problem-solving skills. Hints are given, but the student has to choose which option would be best. The site requires FLASH! Get it from the TeachersFirst Toolbox page.

tag(s): africa (166), animals (319), environment (321), problem solving (294)

#### In the Classroom

Your students will need a good 15-30 minutes to complete this activity either as a class or individually. Don't forget to use an interactive whiteboard if you are doing this as a class activity. Students will want to visit again at home, so include the link on your teacher web page, as well.

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### Analytical Problems And Puzzles - folj.com

3 to 12
This very simple site, created by an anonymous puzzle-lover, is a treasury for logic problems and lateral thinking puzzles to use in your classroom or beyond. Click on the puzzle ...more
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This very simple site, created by an anonymous puzzle-lover, is a treasury for logic problems and lateral thinking puzzles to use in your classroom or beyond. Click on the puzzle type you want. Use them as brain warm-ups in a math or science class before venturing into problem-solving or inquiry process or simply to engage the brains before starting any activity. There are different levels of logic and different types of lateral thinking puzzles, each with a hint before revealing the complete answer. These puzzles would also be useful for gifted enrichment.

tag(s): gifted (82), logic (244), puzzles (204)

#### In the Classroom

If you don't have time to spend on these in class as often as you would like, print out a single lateral thinking or logic problem each week for your bulletin board and let the students argue about it all week. Or include this link on your teacher website for the students to access outside of class. This site is a life-saver for your study hall the day before a vacation!

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### Inventor of the Week - MIT Lemelson Center

6 to 12
The Lemelson Center at MIT offers a weekly profile of an inventor - some famous, many less so. If you're doing a unit on scientists, creativity, or economic/industrial growth, this...more
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The Lemelson Center at MIT offers a weekly profile of an inventor - some famous, many less so. If you're doing a unit on scientists, creativity, or economic/industrial growth, this site can help students understand how many advances are the result of small, incremental improvements rather than revolutionary breakthroughs.

tag(s): inventors and inventions (89), scientists (69)

#### In the Classroom

Use the inventor of the week section as an activator at the beginning of every week in a science or Physics classroom. This could be used as an activator over the interactive whiteboard or as a learning center or station. This could be used every week or before inventive projects, serving as a motivator!

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### World Geography Quizzes - Sheppard Software

3 to 12
With such poor results as a nation on geography testing, we all should try these geography games to build student knowledge of U.S. and world geography. Students can click on ...more
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With such poor results as a nation on geography testing, we all should try these geography games to build student knowledge of U.S. and world geography. Students can click on the region of the world and practice at different levels of difficulty. Even adults can find a challenge. Offered in a "dial up version" for those accessing the sites from a slower connection. Note: the non-dial-up pages require FLASH. Get it from the TeachersFirst Toolbox page.

tag(s): capitals (23), continents (51), countries (82), maps (294)

#### In the Classroom

Be sure to put a link for these online games and quizzes on your teacher web page for the summer and throughout the school year. Students can use them to practice for your geography quizzes or as extra challenges. The different levels of dificulty will allow you to differentiate your instruction easily.

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### Matchstick Puzzles - zefrank.com

5 to 12
These six puzzles, involving virtual matchsticks, require some clever out-of-the-box thinking. Follow the directions to create a specific number of equal rectangles by moving a limited...more
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These six puzzles, involving virtual matchsticks, require some clever out-of-the-box thinking. Follow the directions to create a specific number of equal rectangles by moving a limited number of matches. It's tougher than it looks. No hints given!

tag(s): puzzles (204)

#### In the Classroom

This is a great find for gifted students. Share the site on an interactive whiteboard or projector, and allow students to work on the puzzles in teams. Have the teams compete to see who can solve the puzzles the fastest, or complete the most. This site is tricky, but is an excellent enrichment activity for a unit on logic or geometry.

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### Random Sudoku

7 to 12
Any Sudoku fans in your classroom? Send them to this site that provides problem-solving techniques, helpful for successfully conquering some of the most fiendish puzzles. Learn about...more
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Any Sudoku fans in your classroom? Send them to this site that provides problem-solving techniques, helpful for successfully conquering some of the most fiendish puzzles. Learn about crosshatching, slicing and dicing, and "penciling in." Discover the five rules that stress finding numbers for squares, rather than finding squares for umbers. This truly is a site for the Sudoku aficionados among us.

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

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### Scrabble

5 to 12
The challenge and creativity of the original board game comes alive in this virtual version. Review the available tools that can undo, redo, withdraw, sort, and even save an ...more
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The challenge and creativity of the original board game comes alive in this virtual version. Review the available tools that can undo, redo, withdraw, sort, and even save an uncompleted game. Although this "solitaire" Scrabble game misses the group interaction of the traditional version, it provides a great opportunity for creative, independent thought related to spelling and vocabulary.

tag(s): spelling (166), vocabulary (317)

#### In the Classroom

This "just for fun" activity can be utilized as a meaningful reward for completing class work early. Channel students to this site for some vocabulary building during down-time.

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### Alice Mazes

4 to 8
This series of eight interactive mazes brings some unique challenges to the usual navigation process. Users must keep an eye on directional arrows and their numeric values, as they...more
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This series of eight interactive mazes brings some unique challenges to the usual navigation process. Users must keep an eye on directional arrows and their numeric values, as they move toward their goal. Mazes can be "restarted" in the likely event that a user may become hopelessly stuck. Solutions are neither simple nor quick, so recommend these to your most tenacious students who love a challenge. Great extension activity for gifted and high ability students.

tag(s): puzzles (204)

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### Mankala - Roger E. Critchlow, Jr.

7 to 12
Most students are familiar with the traditional Mankala game that uses a rectangular wooden board and stones, but this online version adds a few interesting options and variations....more
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Most students are familiar with the traditional Mankala game that uses a rectangular wooden board and stones, but this online version adds a few interesting options and variations. Read the instructions carefully! Students can play against the computer or with a partner.

#### In the Classroom

Add this mind-stretching game of strategy to a unit on African history and culture. A nice activity to add to a celebration of Black History Month.

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### Sudoku Mini - TeachersAndFamilies

3 to 7
This mini version of the highly popular Sudoku game is just right for honing elementary students' math and logic skills. Find the right numbers to fill all the squares. There's ...more
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This mini version of the highly popular Sudoku game is just right for honing elementary students' math and logic skills. Find the right numbers to fill all the squares. There's a new game each week. An expanded Sudoku game is available in the TeachersAndFamilies member area. Requires the FLASH plug-in.

tag(s): logic (244), puzzles (204), sudoku (16)

#### In the Classroom

Use this one as a self-stufy resource to build math and logic skills.

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### Brain Food - Rinkworks

5 to 8
Word games, logic problems, and riddles can provide invaluable problem-solving practice for your students, regardless of your subject area. This site offers links to hundreds of challenging...more
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Word games, logic problems, and riddles can provide invaluable problem-solving practice for your students, regardless of your subject area. This site offers links to hundreds of challenging activities that will provide a work-out for the mind.

tag(s): logic (244), riddles (16)

#### In the Classroom

Use these activities as enrichment options in your classroom.

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### The Ultimate Puzzle Site

4 to 12
This collection of puzzles, riddles, brainteasers, and interactive tests challenges students to think outside of the box and improve their analytical skills while having fun. Puzzles...more
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This collection of puzzles, riddles, brainteasers, and interactive tests challenges students to think outside of the box and improve their analytical skills while having fun. Puzzles are graded by level of difficulty and the amount of math needed to arrive at a solution.

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

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### Consecutive Numbers Problem - PBS

6 to 8

Here's a math activity that will test students' skills at logic as well as number operations. Students must arrive at a series of consecutive numbers that add up to a ...more
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Here's a math activity that will test students' skills at logic as well as number operations. Students must arrive at a series of consecutive numbers that add up to a target total. It's a tricky challenge, and the site includes comments from several students on the strategies they used to solve the problem. Try this one for students who need a little extra challenge now and then.

tag(s): estimation (48), logic (244), numbers (194)

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### Activities: Harry Potter and the Order of the Phoenix - TeachersFirst

4 to 8
TeachersFirst offers a chapter-by-chapter set of activities for Harry Potter and the Order of the Phoenix . Designed to be used after each chapter, the activities include science...more
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TeachersFirst offers a chapter-by-chapter set of activities for Harry Potter and the Order of the Phoenix . Designed to be used after each chapter, the activities include science searches, writing, and art projects suitable for individual or group use. The ideas and activities ask you to respond, extend, discuss, create, and more. There is simply no better way to try new "After Reading" strategies. Don't miss this great collection as a way to encourage anyone to get the most from reading and re-reading a new favorite. Find links to activities for two other Harry Potter books on the Intro page.

tag(s): harry potter (10)

#### In the Classroom

Share the link on your teacher web page or in a parent newsletter, if you don't have time to do all the activities at school. Challenge students to design similar activities to accompany other Harry Potter (or other favorite) books.

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### Activities: Harry Potter and the Half-Blood Prince - TeachersFirst

4 to 8
TeachersFirst offers a set of chapter-by-chapter response activities for Harry Potter and the Half Blood Prince. Use art, writing, and web research to answer questions or think...more
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TeachersFirst offers a set of chapter-by-chapter response activities for Harry Potter and the Half Blood Prince. Use art, writing, and web research to answer questions or think about the issues in a particular chapter. Ideal for individual use, and many of these could serve as the basis for a group discussion on topics like loyalty and leadership. The ideas and activities ask you to respond, extend, discuss, create, and more. There is simply no better way to try new "After Reading strategies. Don't miss this great collection as a way to encourage anyone to get the most from reading and re-reading a new favorite. Find links to two other sets of Harry Potter book activities on the Intro page.

tag(s): harry potter (10)

#### In the Classroom

Share the link on your teacher web page or in a parent newsletter, if you don't have time to do all the activities at school. Ask students to design similar activities to accompany other Harry Potter (or other favorite) books.

Very good way of planning. kel, GA, Grades: 3 - 5

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### Jig Zone - jigzone.com

1 to 12
Make this virtual jigsaw puzzle site available for those inevitable moments of "downtime" in the classroom. Choose a topic from the gallery (preferably one that relates to your curriculum),...more
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Make this virtual jigsaw puzzle site available for those inevitable moments of "downtime" in the classroom. Choose a topic from the gallery (preferably one that relates to your curriculum), select a level of difficulty (number of pieces), and start the challege. These puzzles are not only a lot of fun, but good exercises for developing spatial skills. The pop-ups are annoying but can be blocked by Windows XP. Allow time for the site to load. Check the Frequently Asked Questions link (at the bottom of the page)for troubleshooting if you are having difficulty making the puzzles work.

tag(s): puzzles (204)

#### In the Classroom

Combine a brain-warming activity with a bit of review, and create your own jig-saws for students to solve! First, access the section entitled "Turn your photos into puzzles," and select an image pertinent to a specific unit and upload it to the site. Once the jigsaw puzzle has been created, have students open the puzzle on individual computers and compete to see who can get the best time putting the image back together! The best images to use would be diagrams, or model images of a particular object. This site works amazingly well for science classes were students need to be familiar with specific images. An example would be have anatomy students re-construct skeletal images, etc. A clever way to get their minds thinking!

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### Word Morph - WordPlays.com

6 to 12
This challenging, interactive word game is more than a "just-for-fun" activity. Students must use strategy and vocabulary skills to make changes to a starting word - one letter at a...more
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This challenging, interactive word game is more than a "just-for-fun" activity. Students must use strategy and vocabulary skills to make changes to a starting word - one letter at a time - and form a new word. Each word morph can be solved in 10 moves or less, but must be completed within 5 minutes. A purposeful and competitive "filler" to add to a language arts class.

tag(s): thesaurus (23), vocabulary (317), word choice (28)

#### In the Classroom

Use this site as a learning station for students who may finish work early, and need something productive to do to avoid bothering other students. To make it competitive, keep a record board near the computer where students can log their high scores. Competing against each other may make students more interested to play for a new minutes at a time, and less likely to disturb others in testing situations.

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### Brainteasers - Houghton Mifflin

3 to 8
Tune in weekly to this site for new brainteasers designed to challenge students in grades three through eight. Check back a week later to see if you've solved them correctly. ...more
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Tune in weekly to this site for new brainteasers designed to challenge students in grades three through eight. Check back a week later to see if you've solved them correctly. Hints are provided for each question. Use this site as a motivator for your math students - reward extra points for those who choose to exercise their problem-solving skills.