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

### Visual Fractions - Richard Rand

3 to 9
This site is a tutorial that models fractions with number lines or circles through several different options. Applets are divided into categories such as identify fractions, rename...more
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This site is a tutorial that models fractions with number lines or circles through several different options. Applets are divided into categories such as identify fractions, rename fractions, compare fractions, investigate fractions, and much more. Each category contains different options for exploration with flash applets to practice that skill. The "investigate" option offers step-by-step explanations of the different categories and would be very useful to offer students when reviewing skills such as comparing fractions and using order of operations. Some of the slide shows are also available in PDF form along with practice worksheets. Another component of the site allows you to input your own fractions to practice your own examples.

tag(s): decimals (131), fractions (234), percent (83), test prep (96)

#### In the Classroom

Introduce this site on your interactive whiteboard or projector. Have the students open the site and use the whiteboard tools to explore and practice different aspects of fractions. Then have students explore this site independently or in small groups. Use this site on a projector or interactive whiteboard to discuss and informally assess prior knowledge as you start your study of fractions. Create a link to this site on classroom computers, and your classroom website or blog for students to explore.

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### Math.com - Leap of Faith Financial Services, Inc

5 to 12
This site offers many opportunities for math exploration for both teachers and students. Although they have a store and ads on the site, much of the site is free and ...more
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This site offers many opportunities for math exploration for both teachers and students. Although they have a store and ads on the site, much of the site is free and worth a visit. One especially helpful portion of the site is the link to different types of calculators from basic to graphing to mortgage and loan calculators. Students and parents will find the homework section of the site helpful as it is categorized by different topics, then each topic is further divided into sections. For example, under fractions you will find definitions, reducing, adding and subtracting, multiplying and dividing. In each of those portions there is a section with a first glance (overview), in-depth, examples, and workout. There is also a unit quiz for each section. Another helpful area of the site is the practice section which offers practice in many different math skills such as square root, percent, and integers. The games section offers practice with critical thinking skills through logic puzzles and games such as chess.

tag(s): calculators (41), fractions (234), integers (41), percent (83), test prep (96)

#### In the Classroom

Create a link to this site on your classroom website or blog to share with students and parents as a resource at home. Display portions of the site on your interactive whiteboard or projector when introducing a unit or lesson or when reviewing at the end of a unit. Use the calculators on your interactive whiteboard during whole class lessons.

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### Geometry of the Ancients - Learning Wave

5 to 8
Take the Challenge of the 7 Cups within this site. Sections include basic skills, critical thinking, and in-depth looks at circles, trapezoids, rectangles, and triangles. Each of the...more
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Take the Challenge of the 7 Cups within this site. Sections include basic skills, critical thinking, and in-depth looks at circles, trapezoids, rectangles, and triangles. Each of the 4 topics has a printable activity to practice finding area within each of the shapes. Once the activities are completed, the answers will help to solve the Riddle of the 7 Cups.

tag(s): area (68), geometric shapes (165)

#### In the Classroom

Create a link on classroom computers to use as a challenge activity for students. Individual activities can be printed and used for practice in finding area. Create a classroom bulletin board displaying each of the problems and post solutions as they are found, then use the solutions to solve the Riddle of the 7 Cups.

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### Baseball-Reference

6 to 12

This site is perfect to practice math skills using real-time information and statistics from the American and National Leagues. A vast amount of data is available including prices of...more
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This site is perfect to practice math skills using real-time information and statistics from the American and National Leagues. A vast amount of data is available including prices of recent transactions, team and player statistics, streaks, and more. Considerable data is included for All-Star games, postseason stats, and frivolities such as birthdays and birthplaces. Information is also included for minor league teams. Be sure to check out the tutorial videos that help users with the site. Videos include information on box scores and their features, player and team gamelogs, and a 17 minute video reviewing features and layout of the baseball-reference site.

tag(s): charts and graphs (195), data (153), probability (132), statistics (125)

#### In the Classroom

Watch the information video on the website on your interactive whiteboard (or projector) as an introduction to the site. Allow students time to explore the site on their own or with a partner. This site is perfect for students to practice working with statistics and graphing. Have students choose a player or team and graph statistics, then compare these statistics with other students' data. Challenge students to research statistics on the site to find unusual information and research what may have happened. Have students create a multimedia presentation to share with the class such as a simple online posters using PicLits (reviewed here). Or compare data from students' favorite teams and create a class graph.

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### KenKen Puzzles - New York Times

3 to 12
KenKen is a puzzle game similar to Soduku with the added twist that numbers in dark-outlined areas must combine to produce the target number indicated. Read the fully illustrated tutorial...more
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KenKen is a puzzle game similar to Soduku with the added twist that numbers in dark-outlined areas must combine to produce the target number indicated. Read the fully illustrated tutorial for more information. Each day the New York Times provides 6 new puzzles in 3 different skill levels. This is a great activity for practicing math operations and also developing problem solving and critical thinking skills.

tag(s): logic (239), problem solving (273), puzzles (207)

#### In the Classroom

Create a link to the site for students to use at computer centers or the computer lab. Print out puzzles and allow students to work with a partner to solve during center time. Challenge students to complete puzzles at different skills levels. Share a puzzle on the interactive whiteboard as students are entering the classroom and complete the puzzle together.

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### Dr. Mike's Math Games - Michael Hartley

K to 7
If you are looking for fun math interactives and printable, this is the place for you! Hundreds of activities are available and are sorted in several different formats. Search by ...more
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If you are looking for fun math interactives and printable, this is the place for you! Hundreds of activities are available and are sorted in several different formats. Search by grade level, board games, worksheets, printable games, and more. Some grade levels also offer customizable worksheets. If you aren't sure what you are looking for, try the Cool Math Games link to view the most highly rated games or the Popular Math Games link to find the most visited games. Visitors can sign up to receive an email when new games are available and subscribe to Dr. Mike's blog and newsletter. There are some ads on the site that you will want to have students avoid.

tag(s): fractions (234), number sense (94), numbers (200), puzzles (207), sudoku (18), worksheets (62)

#### In the Classroom

Create a link on your classroom computer to appropriate activities for your students. Use the printable games for classroom math centers, such as BINGO for #1-10 (kindergarten.) Share a link to the site on your classroom website or blog for students to access at home.

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### The Fruit Game - 20/20 Technologies

3 to 12

In this activity, you take turns removing fruit from the table, in accordance with the rules. Whoever takes the last fruit from the table is the winner. This is a ...more
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In this activity, you take turns removing fruit from the table, in accordance with the rules. Whoever takes the last fruit from the table is the winner. This is a one player game - you versus the computer. Although it is deceptively easy, it is enjoyable to plan a winning strategy based on the different amount of fruit presented for each game. Rules are included as an overview before playing.

tag(s): critical thinking (112), logic (239), probability (132), problem solving (273), puzzles (207)

#### In the Classroom

This challenge is perfect for the interactive whiteboard or projector. Demonstrate how to use the site and then allow students to challenge the computer to see if they can win. Use this site as a problem solving center and have students journal about different strategies for winning the game.

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### Jokes for Math Teachers - Clem Falbo

4 to 12
What did one math book say to the other? Don't bother me I've got my own problems! Are you looking for more bad jokes like this for your math class or ...more
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What did one math book say to the other? Don't bother me I've got my own problems! Are you looking for more bad jokes like this for your math class or perhaps a staff presentation? This site is for you! Choose from over 40 math jokes listed on this site, or send in your own. Who says math teachers can't be funny?

tag(s): riddles (16)

#### In the Classroom

Share a joke a day with your classroom or encourage them to create their own jokes. Use a joke to introduce a new topic and explore what makes it funny. Share a joke a week on your class website or blog and encourage readers to add their own joke or spin on the joke. Add an entire math joke section to your class wiki and give extra credit to promote a multiple intelligence approach to math.

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### Number Gossip - Tanya Khovanova

5 to 12
Are you looking to have some fun with numbers or a quick class-starter? This site may be for you! Enter a number and find out all you wanted to know ...more
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Are you looking to have some fun with numbers or a quick class-starter? This site may be for you! Enter a number and find out all you wanted to know but were afraid to ask. For example, enter 9 and you will find out that 9 is the only number (except one) which is equal to the sum of the digits of its square and that 9 is the smallest odd composite number. Below the list of information are common properties of the number entered. Some numbers also include links to web pages about that number - for example, enter the number 6 and there is a link to Some Thoughts on Number 6 by John Baez.

tag(s): data (153), numbers (200), puzzles (207)

#### In the Classroom

Display the page on your interactive whiteboard or projector at the beginning of the class to spur math discussion. Choose some interesting information on numbers to use for a Fact of the Day or Interesting Information of the Week for students. Create a bulletin board displaying interesting facts about numbers for your classroom.

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### WorksheetWorks - WorksheetWorks.com

K to 12
The goal of this site is to provide the finest quality paper-based teaching materials to teachers and parents around the world. Myriads of options are available to create worksheets...more
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The goal of this site is to provide the finest quality paper-based teaching materials to teachers and parents around the world. Myriads of options are available to create worksheets in Math, English, Geography, Puzzles, and Miscellaneous. Just choose a subject, then a topic, and choose from options offered to create your own worksheet that can be printed in pdf form. This allows the worksheet to be shown clearly on interactive whiteboards eliminating the need to print each creation. Although it was created for teachers, a more useful purpose may be for students to create their own worksheets to share with other students or for self-practice.

tag(s): printables (38), puzzles (207), worksheets (62)

#### In the Classroom

Use this site to differentiate for students of all levels by allowing students to create their own worksheet for practice or review. Make a shortcut to this site on classroom computers and use it as a center - students can then create their own individualized practice.

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### Brainormous - Brainormous

3 to 8

Although this site is predominately a purchase site, there are a few free practice activities available for multiplication. This site is a good resource for the classroom. Students...more
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Although this site is predominately a purchase site, there are a few free practice activities available for multiplication. This site is a good resource for the classroom. Students will need to be informed to use only the links with the green button indicating a "free" activity. At the time of this review, there were seven free interactives!

tag(s): logic (239), multiplication (220), time (140)

#### In the Classroom

Share these activities on your interactive whiteboard or projector. Create a link to free activities on classroom or computer lab computers to use when reviewing multiplication facts. Create a link to the free activities on your classroom blog or website so that students can practice at home.

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###### More

4 to 10
This ativity provides positive reinforcement of correct math answers with a basketball player taking a shot at the basket. Click Start or any of the questions in the Table of ...more
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This ativity provides positive reinforcement of correct math answers with a basketball player taking a shot at the basket. Click Start or any of the questions in the Table of Contents left of your window to see a mathematics question and animation. If you answer the question correctly, the result will be a basketball shot animation; incorrect responses yield the correct answer. Questions include various strands and levels of mathematics such as rounding numbers, perimeter, word problems, common factors, and much more. At the completion of each round, the score appears with the number of correct responses and percentage correct. You must either click the back button (if you want to remain within the same topic) or click on a new topic to move on to the next question. The game is available in Spanish.

tag(s): charts and graphs (195), decimals (131), exponents (42), factors (40), fluency (24), map skills (81), number sense (94), operations (123), perimeter (30), problem solving (273), rounding (22)

#### In the Classroom

Introduce this site on your interactive whiteboard or projector. Then have students explore this site independently or in small groups. Create a class graph of scores, and challenge students to increase their percentage of correct problems. Share as a Favorite on your TeachersFirst public page or on your class website or blog for students to access the site outside of class.

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### Brain Teasers - Pedago.net

4 to 12
This simple site offers hundreds of brain teaser problems along with answers. Categories include friends, math, logic, optical illusions, puzzles, and more. Some topics are NOT suitable...more
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This simple site offers hundreds of brain teaser problems along with answers. Categories include friends, math, logic, optical illusions, puzzles, and more. Some topics are NOT suitable for the classroom (such as dating.) Each brain teaser is fairly short and includes a link to click on the answer.

tag(s): logic (239), optical illusions (13), problem solving (273), puzzles (207)

#### In the Classroom

Choose a problem to use for a problem of the day or problem of the week in your classroom. Students can explain the problem solving process in math journals. Use several problems in a math problem-solving center. Copy several problems and have students store them in math folders to complete when finished with other work.

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### Area Explorer - Shodor

3 to 9

This site provides multi-leveled practice with calculating the area of random shapes. The applet allows the creation of random shapes to be used in finding area. Options allow for changing...more
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This site provides multi-leveled practice with calculating the area of random shapes. The applet allows the creation of random shapes to be used in finding area. Options allow for changing the perimeter, displaying the rectangular outline, scored or not scored, and the amount of units to be included. The learner area of the site explains the concept of area and includes charts comparing metric to standard units as well as an explanation on how to convert square feet into square meters. The instructor area includes links to standards and some textbooks, information needed for classroom use, links to similar resources, and a link to downloadable exploration questions.

tag(s): angles (86), area (68), perimeter (30)

#### In the Classroom

Use this site as an anticipatory set or "activator" to introduce a unit or lesson on area on a projector or interactive whiteboard. Then have students complete the exploration questions on their own or with a partner. Use this site on a projector or interactive whiteboard to discuss and informally assess prior knowledge as you start your study of area. Make a link on classroom computers to use as a center activity.

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### Angles - Shodor

6 to 12

This site provides practice with vocabulary associated with angles. Common Core State Standards are addressed for fourth and seventh grades and geometry. The site is also appropriate...more
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This site provides practice with vocabulary associated with angles. Common Core State Standards are addressed for fourth and seventh grades and geometry. The site is also appropriate for younger grades to use when learning and processing information about angles. The learner section has detailed explanations about different types of angles that can be used as a review when working with angles. The instructor area has correlations to standards, classroom information, links to similar resources, and a downloadable exploration questions sheet. The activity allows options of one or two transverals and scoring can be used or turned off.

tag(s): angles (86), geometric shapes (165)

#### In the Classroom

Introduce this site with your interactive whiteboard or projector. Then have students explore this site independently or in small groups to complete the exploration questions. Use this site as an anticipatory set or "activator" to introduce a unit or lesson about angles on a projector or interactive whiteboard. Create a link to the site on your classroom webpage or blog for students to practice at home.

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### Single Fraction Finder - Shodor

6 to 8

Visually experiment with the relationship between the value of fractions and areas within a square or a circle with this activity. It also provides practice with viewing fractions in...more
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Visually experiment with the relationship between the value of fractions and areas within a square or a circle with this activity. It also provides practice with viewing fractions in a circle or square and the representation on a number line. Scoring is available; however, it can be turned off to allow students to practice freely. Be sure to check out the instructor area which provides links to standards, possible classroom uses, and links to related resources.

tag(s): area (68), fractions (234), geometric shapes (165), test prep (96)

#### In the Classroom

Introduce this site on your interactive whiteboard or projector. Then have students explore this site independently or in small groups. Provide this link on your class website for students to access both in and out of the classroom.

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### Number Base Clock - Shodor

3 to 12

This site provides practice in converting from base 10 to other values up to base 16. Three clocks are displayed and options are provided for choosing the value used on ...more
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This site provides practice in converting from base 10 to other values up to base 16. Three clocks are displayed and options are provided for choosing the value used on the clocks. Upon entering the choice, the hands on the clock turn to show the appropriate representation in the chosen base. The learner section provides information on base number systems and how they have been used in the past. The instructor section provides links to standards, place value in the curriculum, possible issues that may arise in the classroom and links to additional resources including an activity sheet.

tag(s): base ten (11), number sense (94)

#### In the Classroom

Provide students with the exploration questions and let them work with a partner to solve. Display the site on the interactive whiteboard or projector as a springboard to introduction of bases other than the base 10 system. Use when studying Ancient Mayans to demonstrate their counting system that used base 20.

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### Single Fraction Pointer - Shodor

6 to 8

This site provides students the opportunity to visually relate fractions within a square or circle to the representation of the same fraction on a number line. The activity begins with...more
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This site provides students the opportunity to visually relate fractions within a square or circle to the representation of the same fraction on a number line. The activity begins with empty shapes, with the pointer pointing to zero. As the desired sections are colored, the pointer moves along the number line corresponding to the fraction of the shape that bas been colored. The instructor area of the website provides information on how the activity corresponds within the math curriculum, links to standards, classroom preparation and links to related resources.

tag(s): estimation (46), fractions (234), number lines (25), numbers (200)

#### In the Classroom

Demonstrate the activity on your interactive whiteboard or projector, then allows students to explore on their own on classroom or lab computers. For assessment or accountability, have students recreate several fractions found during their exploration. Provide a link to the site on your classroom website or blog for practice at home.

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### Positive Linear Function Machine - Shodor

6 to 12

This site provides great practice with linear functions in the format of y=m*x+b. Integers between 0 and 10 are available for use. The activity can be used with or without ...more
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This site provides great practice with linear functions in the format of y=m*x+b. Integers between 0 and 10 are available for use. The activity can be used with or without scoring. The learner section provides a detailed explanation and examples on how to use the function machine. The instructor sections includes information on how to use the site in the classroom, links to standards and related resources. Be sure to check out the downloadable exploration questions that can be used in the classroom.

tag(s): functions (69), logic (239), patterns (85), problem solving (273)

#### In the Classroom

Demonstrate the site on your interactive whiteboard or projector by introducing the learner section and discussing examples included. Provide students with a copy of the explorations questions to complete on their own or with a partner. Provide a link on classroom computers to use as a classroom center. Provide a link on your classroom website or blog for students to practice at home.

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### Mixtures - Shodor

5 to 9

This site provides good practice with mixtures to create percent problems through 4 different activities. Activities include exploration, unknown pile, unknown percent, or unknown total....more
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This site provides good practice with mixtures to create percent problems through 4 different activities. Activities include exploration, unknown pile, unknown percent, or unknown total. The site includes sections for both learners and instructors. The learners section explains how mixtures are used in the real world and the instructor section provides curriculum and standards alignments, classroom suggestions, and links to related resources. This site would also work well in a chemistry class.

tag(s): percent (83)

#### In the Classroom

Have students try out this site on individual computers, or as a learning center. Make a shortcut to this site on classroom computers and use it as a center. Share this link on your class website for students to access at home. This site offers multiple modes of use, so it is easy to differentiate for ability levels within your class.