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

### Venn Diagram Shape Sorter - Shodor

3 to 8

This site provides the opportunity to explore Venn Diagrams through the use of shapes. Different ways to create the diagrams are provided by choosing one or two circles and choices...more
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This site provides the opportunity to explore Venn Diagrams through the use of shapes. Different ways to create the diagrams are provided by choosing one or two circles and choices of circle placement. With the "Guess the Rule" option, players try to find the rule based on shapes that are allowed into the design. The learner area provides a background on Venn diagrams and how they might be used in everyday living. The instructor area provides printable exploration questions, links to standards, classroom preparation tips, and links to similar resources.

tag(s): logic (246), problem solving (292)

#### In the Classroom

Introduce this site on your interactive whiteboard or projector. Then have students explore this site independently or in small groups. Ask students to create their own Venn Diagram and have other students guess the rule. Consider using a site such as Interactive Two Circle Venn Diagram (reviewed here). Use the site to demonstrate Venn Diagrams that might be used with different subjects: Science - use to sort animals by different characteristics, Social Studies - sort countries by different types of rule over a given time period. The possibilities are endless.

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### Comparison Estimator - Shodor

3 to 8

This site offers practice in estimating skills through different visual comparisons. Problems are available in counting, length and area. Two comparisons are shown and then selection...more
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This site offers practice in estimating skills through different visual comparisons. Problems are available in counting, length and area. Two comparisons are shown and then selection will be made based on the question posed with the problem. Hints are available and there are two different levels of difficulty available. Tabs are also included with information for the learner, activity help, and information for instructors. Be sure to check out the information for instructors which include suggestions on how to use in the classroom, an activity sheet, links to standards, and other similar resources.

tag(s): estimation (47), problem solving (292), test prep (94)

#### In the Classroom

Print the exploration questions found on the instructor tab for students to complete. Display activities on your interactive whiteboard or projector as a 5 minute time filler to practice estimation skills.

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### Clock Arithmetic - Shodor

4 to 8

This activity works well for explorations with clock (modular) arithmetic. The clock can be adjusted from 2 to 24 hours, then the number of elapsed hours can be entered to ...more
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This activity works well for explorations with clock (modular) arithmetic. The clock can be adjusted from 2 to 24 hours, then the number of elapsed hours can be entered to determine the current time. Be sure to check out the instructor tab which provides a link to a student worksheet, indicates alignment to some state standards, suggested classroom uses, and offers similar resources.

tag(s): time (139)

#### In the Classroom

Display on the interactive whiteboard or projector when introducing the concept of military time to show a 24 hour clock. Allow groups of students to work together to create different clocks and practice elapsed time on each.

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### Word Games - FPS Networks Inc.

2 to 12
Word Games has compiled many of the web's best word games into one resource. Games are categorized in several different ways such as typing, word search, puzzles, and others. In ...more
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Word Games has compiled many of the web's best word games into one resource. Games are categorized in several different ways such as typing, word search, puzzles, and others. In addition, the newest and most popular games are identified for easy access. Facebook users can "like" the site and receive daily games to play. This site provides varied activities to help increase word skills at many different levels.

Navigate carefully as this site has many advertisements! But the great interactives make it worth the hassle.

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

#### In the Classroom

Introduce this site on your interactive whiteboard or projector then have students explore this site independently or in small groups. Make a shortcut to this site on classroom computers and use it as a center. Provide a link to these activities on your class website.

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### Sequencer - Shodor

6 to 12

This site provides practice in introducing sequences, allowing students to create sequences by varying the starting number, multiplier, or add-on, reinforce previously obtained knowledge...more
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This site provides practice in introducing sequences, allowing students to create sequences by varying the starting number, multiplier, or add-on, reinforce previously obtained knowledge regarding the behavior of sequences, and practice computational skills. Be sure to check out the learner and instructor areas for valuable explanations. The learner area includes a detailed explanation of the activity and sequences. The instructor area provides links to standards, information about questions that may arise in the classroom, and links to additional resources. In addition, there is a downloadable sheet of exploration questions to be used in the classroom.

tag(s): equations (153), functions (69), operations (119), patterns (87)

#### In the Classroom

Introduce the website on your interactive whiteboard or projector by discussing the information on the learner area. Practice inputting information and creating equations as a class and challenge students to create their own equations. Set up the whiteboard at the side of your room for small groups to investigate further. Create a link on your classroom computers to use as a learning station. Provide this link to students on your class website for some additional practice (at home or the lab). Have students create their own sequencing "What comes next?" puzzles for classmates to solve, sharing the questions on a class wiki or in a Google Doc for others to try.

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### Order of Operations Quiz - Shodor

6 to 8

This site provides good practice with order of operations. User options include choices of addition, subtraction, multiplication, division, exponents, and parenthesis. Different levels...more
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This site provides good practice with order of operations. User options include choices of addition, subtraction, multiplication, division, exponents, and parenthesis. Different levels are provided for use of whole numbers only and 3 different skill levels. There is also a timer that can be set from 10 to 60 seconds or can be turned off for unlimited time on the quiz. The learner tab provides some examples and equations using order of operations. Be sure to check out the instructor tab which includes links to standards, some alignment to textbooks, issues that may arise in the classroom and links to similar resources.

tag(s): addition (224), exponents (44), numbers (191), operations (119), order of operations (40), subtraction (186), whole numbers (16)

#### In the Classroom

Make a shortcut on classroom or lab computers to use for student practice. Post the site on your classroom website or blog for students to use at home. Assign students to share one problem with the class that they had difficulty with and explain how the problem should be solved.

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### Math Fun Facts - Harvey Mudd College

7 to 12
This website can generate random, thought provoking math facts. Or, it can be searched by type of math and level of fact difficulty. While most math content is high school ...more
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This website can generate random, thought provoking math facts. Or, it can be searched by type of math and level of fact difficulty. While most math content is high school level, some of the easier problems may be used with seventh and eighth grades. The search option appears to save time if you are looking for a specific variety of math such as calculus. Although this site is rather "plain vanilla" and does include some unobtrusive ads, it is definitely worth adding to your math collection!

tag(s): brain (65)

#### In the Classroom

Use this type of fact as a class warm-up exercise or bell ringer activity to have students get actively engaged in learning from the moment they enter your classroom. Or, use it as a Fun Friday Math Fact activity. Assign students into small groups or partners to "solve" a math fact. Additionally, many of these facts could be turned into mini-math research project. Have students investigate this site independently and share their findings with the class by creating an interactive online poster using Genial.ly, reviewed here.

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### Whole Number Cruncher - Shodor

3 to 8

This site provides practice with linear functions through the use of a function machine. Options include use of addition or multiplication and use of integers from 0 to 10. The ...more
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This site provides practice with linear functions through the use of a function machine. Options include use of addition or multiplication and use of integers from 0 to 10. The learner section provides a great background on linear functions and how they are used with higher level mathematics such as calculus. There is a detailed help area that provides instructions on how to use the function machine. Be sure to check out the instructor area that includes standards addressed, classroom ideas, links to similar resources and a printable exploration questions that can be used in the classroom.

tag(s): functions (69), logic (246), patterns (87)

#### In the Classroom

Introduce the activity on your interactive whiteboard or projector, then provide students with the exploration questions to complete on their own or with a partner. Provide a link on your classroom website or blog for practice at home. Make a shortcut to this site on classroom computers and use it as a center. Have students create their own function machines to be solved by classmates.

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### Tables and Chairs - Shodor

6 to 12

This site provides practice with identifying patterns using a table and chairs visual. Practice involves exploration, where the student chooses the length and arrangement of the table...more
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This site provides practice with identifying patterns using a table and chairs visual. Practice involves exploration, where the student chooses the length and arrangement of the table (straight line or rectangle) or guess based on the random image generated. Be sure to check out the in-depth explanation on the learner portion of the website. The instructor area includes a description, links to standards, classroom information and links to similar resources. Exploration questions can be downloaded for classroom use.

tag(s): equations (153), logic (246), patterns (87), problem solving (292)

#### In the Classroom

Introduce the site on your interactive whiteboard or projector by beginning with the learner section of the site. Discuss the different arrangements of tables and chairs and how seating capacity changes based on table arrangements. Allow students to complete the exploration questions on their own or with a partner. Provide a link on your classroom website or blog for students to use at home. Challenge able students to create pattern challenges of their own for classmates to try on an interactive whiteboard using shapes and colors.

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### More or Less Estimator - Shodor

3 to 8

This activity allows the user to estimate quantities and sizes including the number of objects in a set, the lengths of a curve, and the area of a shape. Many ...more
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This activity allows the user to estimate quantities and sizes including the number of objects in a set, the lengths of a curve, and the area of a shape. Many options are available for exploration - the size of the curve can be changed, problem type can be changed and there are 2 levels of difficulties. The learner section explains the activity as well as discusses how estimation is used in everyday life. In addition to a description of the activity, the instruction section provides possible issues to address in the classroom, links to standards, and links to other similar resources.

tag(s): estimation (47), measurement (179)

#### In the Classroom

Introduce the activity on the interactive whiteboard or projector and model for students how to use estimation instead of actually counting the figures. Use the site as a springboard to discuss when estimation is appropriate and when measurement is needed. Use the site to begin discussions on what level of estimation is needed in different circumstances (close, really close and almost perfect).

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### Math Solutions - Math Solutions

K to 12

This site provides many resources for math teachers of all grades and includes lesson plans, articles, classroom and administrator questions and answers, and helpful links - all located...more
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tag(s): problem solving (292)

#### In the Classroom

Take advantage of the free lesson plans; also search for plans in grades higher and lower that can be modified to meet your students' needs. Display student work included with the lesson plans on your interactive whiteboard or projector as conversation starters in your classroom - allow students to discuss other students' work to increase understanding of concepts.

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### Fire: Estimating Percent - Shodor

6 to 8

Practice estimating skills with number and percent on this website. After inputting a fractional probability of the "burn," click on the forest for the fire to take place. Based on...more
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Practice estimating skills with number and percent on this website. After inputting a fractional probability of the "burn," click on the forest for the fire to take place. Based on the number of trees burned, input the estimate of number or percent of trees burned. Choices are also available for how close the estimate should be - close, really close, or almost perfect. Be sure to check on the link for instructors that provides an exploration worksheet, links to standards, items for classroom discussion, and links to similar resources.

tag(s): estimation (47), fractions (229), percent (80), probability (135), test prep (94)

#### In the Classroom

Print out the exploration worksheet for students to complete, then discuss using your interactive whiteboard or projector. Using the interactive whiteboard, discuss why the probability of burn doesn't always equal the actual burn amount. Create a link on your classroom website, wiki, or blog for students to practice at home.

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### Snappy Words-Free Visual Online Dictionary - Snappy Words.com

2 to 12
Snappy Words visual dictionary is an easy-to-use online interactive English dictionary and thesaurus. It provides the meanings of words or phrases, generates synonyms, and draws...more
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Snappy Words visual dictionary is an easy-to-use online interactive English dictionary and thesaurus. It provides the meanings of words or phrases, generates synonyms, and draws connections to associated words. Simply type a word in the search box and click "GO." Instantly you will see a word map. An extra built in feature is the words in the visual interactive display are color coded according to parts of speech. Look up as many words as you need anytime; there is no limit on the number of searches and no registration is required. As with most online tools, teacher monitoring is strongly advised.

tag(s): maps (292), parts of speech (67), speech (86), thesaurus (23)

#### In the Classroom

Teachers and students on all grade levels will love usingSnappy Words for all subjects. Demonstrate it on your classroom whiteboard or projector, bookmark it in your favorites, and make it directly available to students from your class webpage. Elementary students will enjoy defining their spelling words or content area vocabulary. They can categorize their words by parts of speech or create a list of synonyms. Students can then create their own word "maps" for new vocabulary words using drawing tools or online graphic organizers like bubbl.us, reviewed here. Middle school, high school and adult learners can use it as a valuable tool for vocabulary specific to a literary work or subject area, preparing for a standardized test, or while reading assigned material or a book, poem, or article of choice. Whether you are writing content for an article, a blog, a letter, or any assignment, minimize this website and play with words to avoid repetition, choose precise meanings and kick your vocabulary up a notch! Share this one on your class web page, for sure.

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### Maths is Fun - Rod Pierce

3 to 9

Math is Fun when you visit this website that is loaded with games, activities and much more! Math activities are divided into topics such as Algebra, Data, Games, Dictionaries, Worksheets,...more
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Math is Fun when you visit this website that is loaded with games, activities and much more! Math activities are divided into topics such as Algebra, Data, Games, Dictionaries, Worksheets, and more. After choosing a topic there are several choices for appropriate activities within the category. The teachers page has links to many virtual manipulatives, puzzles, speed math and other classroom activities. All activities contain an explanation and solution to the puzzle. Although this site may appear as another "drill and kill" site, is also has a lot of extra features and activities included. If you are a math teacher, this is definitely a site worth taking a look at.

tag(s): logic (246), measurement (179), problem solving (292)

#### In the Classroom

Use the teacher's page on the interactive whiteboard or projector to demonstrate math concepts such as symmetry, tessellations, and basic algebra concepts. Assign activities and games to students and let them become the expert in one topic. Use the illustrated math dictionary provided on the site as an example and create a class math dictionary of concepts learned. Have students share their new math term on the class wiki. Not comfortable with wikis? Have no wiki worries - check out the TeachersFirst's Wiki Walk-Through. This may also be a site that you want to include on your class website for students to use both in and out of the classroom.

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### Puzzle Playground - Smart Kit

1 to 12
This site includes many different types of puzzle and brain games that will keep students motivated throughout the school year! There is a TON to offer at this site. ...more
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This site includes many different types of puzzle and brain games that will keep students motivated throughout the school year! There is a TON to offer at this site. Start out easy with a memory match game, move on to strategy activities and work your way toward the Physics Puzzle activity. Interactives are sorted into categories such as word puzzles, logic, spot the difference, and much more.

tag(s): logic (246), problem solving (292), puzzles (205)

#### In the Classroom

This site is ideal to use on classroom computers as a center. Students will think they are playing games; however, they are really expanding their logic and problem solving skills through the interactive activities. This is a great site to list on your class webpage, for students to access both in and out of the classroom. For a bonus/extra credit challenge, ask students to FIND connections between a game and topics/concepts they have been studying and to explain the connections while demonstrating the game on a projector or interactive whiteboard. Hint: start with the Physics challenge.

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### Tangram House - Andrey Orlov

2 to 8
Tangrams are a form of old Chinese puzzles that provide the opportunity for developing spatial sense and problem solving skills. Tangram House provides choices of tangram puzzles to...more
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Tangrams are a form of old Chinese puzzles that provide the opportunity for developing spatial sense and problem solving skills. Tangram House provides choices of tangram puzzles to solve using the seven basic pieces that form a square. Hints can be turned on for beginning users. Be sure to click on the Help and Settings icon to learn more about how to flip, turn, and rotate the tangram pieces.

tag(s): tangrams (13)

#### In the Classroom

Introduce on your interactive whiteboard or projector when beginning a geometry unit on shapes and vocabulary such as turn, flip and rotation. Challenge students to discuss how shapes are moved to form tangrams. Provide this link on your class website for students to use at home. This site is great for younger gifted students!

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### Algebra Meltdown - Manga High

3 to 8

Practice basic linear algebra with this interactive site where the players help scientists working at a nuclear generator. The scientists are impatient, so you have to be quick to solve...more
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Practice basic linear algebra with this interactive site where the players help scientists working at a nuclear generator. The scientists are impatient, so you have to be quick to solve the equations to guide the atoms through each machine on time. Be sure to check out the achievements section which provides information on math skills used at each level. There are some unobtrusive advertisements at this site. You can play without joining or register for a free, basic school account to save some scores.

#### In the Classroom

Have a team competition on the interactive whiteboard or projector and challenge students to move on to higher levels. Students who aren't playing will still be learning as they try to solve problems along with the players. Use the activity as an introduction to algebra skills included in the interactive, such as multiplying and dividing with negatives. Challenge students to come up with the formulas for multiplying and dividing negatives based on correct responses in the activity.

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### Plastelina Logic Games

3 to 8

Test your logic and patience with these interactive logic games. Plastelina offers the option of registration and payment for a password which allows access to all of the activities...more
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Test your logic and patience with these interactive logic games. Plastelina offers the option of registration and payment for a password which allows access to all of the activities on the site; however, many are free and can be played without registration. Free interactives are clearly marked next to the titles. At the time of this review, five activities were FREE.

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

#### In the Classroom

Have a team competition as students use the site on an interactive whiteboard or projector and try to see who can solve the puzzles first. Use the puzzles as a quick time filler and revisit on occasion until the puzzle is solved.

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### LEGO Education Activities - LEGO Education

K to 12

Lego Education Activities are designed to be rich, fun-filled, creative learning experiences. They offer educators a means to use LEGO sets as essential tools that engage students while...more
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Lego Education Activities are designed to be rich, fun-filled, creative learning experiences. They offer educators a means to use LEGO sets as essential tools that engage students while challenging their creativity and enhancing their knowledge and comprehension. As a thinking teacher, you only need to look on the Teachersfirst Editor's Blog here to realize what a hot topic teaching creativity is and how it fits into the classroom. From role-playing and meeting the needs of early childhood development to theme-based sets for older students, LEGO Activities offer a multi-disciplinary approach to teaching. There are also specific sets designed to cover specific subject areas, including technology curriculum. As you browse the activities, you will find obvious connections to curriculum in simple machines and other science topics, as well. Stay current and find a lot more stimulating ideas by checking out the LEGO Education and LEGO Smart Blogs available from theLego Education Activities page.

tag(s): creativity (120), critical thinking (116), logic (246), problem solving (292)

#### In the Classroom

Expose your students to different levels of the learning spiral by challenging them to use problem-solving skills for increasingly difficult obstacles. Students can work in small groups to foster cooperation and teamwork as they sort, graph, follow and give directions, and discuss ideas. Of course you will need some LEGOs, so you might try raiding your own children's toy boxes, include a request in your classroom newsletter for donations, look around for LEGO kits collecting dust on classroom shelves, or put it on your school's PTA wish list. Be sure to have cooperative learning groups video their activities to share with the rest of the class using a site such as SchoolTube (reviewed here).

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### Gymnasium For Brain - Sitalakshmi Seshadrinathan

3 to 12
The goal of this site is to make Math fun and provide mental exercise and stimulation. 100's of warm-up puzzles are provided that require logic and problem solving to come ...more
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The goal of this site is to make Math fun and provide mental exercise and stimulation. 100's of warm-up puzzles are provided that require logic and problem solving to come up with a solution. Hints are provided as well as the solution. The Speed Math section demonstrates different "tricks" as alternatives to standard algorithms in a detailed explanation. Another section demonstrates different Math patterns and how they are formed and expanded. The Kids Corner provides simpler problem solving activities for younger students. Free membership to the site is available.

tag(s): Computational Thinking (32), logic (246), problem solving (292)

#### In the Classroom

Use this site as a resource for a problem of the day activity. Challenge students to solve and provide explanations to logic puzzles and create their own problems. Display on the interactive whiteboard or projector as a springboard to class discussion of the Mathematics involved within each of the problems.