Khan Academy
Khan Academy: Area Challenge
Practice solving problems involving triangles, parallelograms, and composite figures. Exercises include decimals, fractions, and word problems. Area of circles is not included. Students receive immediate feedback and have the opportunity...
Fundación Cientec
Cientec: Juegos Cooperativos
A small collection of 20 or so math brain teasers and word problems, in Spanish. Challenging for younger students -- they use math skills up to multiplication.
National Council of Teachers of Mathematics
Nctm: Figure This: Math Challenges for Families
NCTM offers sections on Families & School, Families & Math, Families & Homework, and more. Has links to brain-teaser problems ranging in skill from very easy to challenging. Click Take a Challenge or Challenge Index for...
National Council of Teachers of Mathematics
Nctm: Thats Interesting
Read this word problem and solve the questions that follow. An extra challenge and an answer check are also provided.
Khan Academy
Khan Academy: Scientific Notation Challenge
Practice solving more challenging problems involving scientific notation. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
Khan Academy
Khan Academy: Pythagorean Theorem Challenge
Solve real-world problems that can be modeled by right triangles, using the Pythagorean Theorem!
CK-12 Foundation
Ck 12: Trigonometry Word Problems
[Free Registration/Login Required] Students will determine the angle of depression using a diagram with a helicopter. Click learn more to watch a video and click challenge me to answer a practice question.
PBS
Pbs: Modeling Fraction Multiplication With Equal Groups
This video presents a visual model for solving a word problem involving the multiplication of fractions. The problem asks students to use the amount of bamboo that a panda eats in an hour to determine how much he eats in a quarter of an...
Khan Academy
Khan Academy: Square and Cube Challenge
Practice solving problems using your knowledge of square and cube roots. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
National Council of Teachers of Mathematics
The Math Forum: Famous Problems in the History of Mathematics
On this site, there are several math problems to explore and solve. Look through some solutions by famous mathematicians and expand your thinking about some interesting math concepts. Teachers of elementary grades may want to use this...
Scholastic
Scholastic: Max's Math Adventures: Good Bye Training Wheels!
Take a bike ride with Max and add up the miles he has traveled. Use the teacher's guide, activity sheet, and extra challenges to create an engaging learning experience!
Scholastic
Scholastic: Max's Math Adventures: Farmer Fred's Counting Farm
Add and rhyme with Farmer Fred, then use the activity sheet to work through some more farm addition. The teacher's guide and extra challenges will be helpful in lesson planning.
National Council of Teachers of Mathematics
The Math Forum: Math World Interactive
MathWorld Interactive "Is a FREE project where students in grades 6 to 8 from around the world work on open-ended problems." Go to the Frequently Asked Questions section for an easy introduction.
Scholastic
Scholastic: Max's Math Adventures: Subtraction Square Dance
This site has a square dance rhyme with some fun subtraction practice. Teachers will appreciate the activity page, the extra challenges, and the teacher's guide for easy lesson planning.
University of Cambridge
University of Cambridge: Nrich: Put Out the Flags
Sharpen your logic and percent skills while working on this challenge. A strategy for solving the problem and the solution are available from links on the left.
University of Cambridge
University of Cambridge: Maths and Sports: The Olympic Torch Tour
Can you find the best route for the Olympic Torch relay to take? This more challenging activity is designed to be accessible to GCSE maths students (grades 8, 9, and 10).
Fun Brain
Fun Brain: Power Football (Decimal Game)
Four levels of play, from easy to super brain, challenge students to add, subtract, multiply, and divide decimals. Get three correct answers in a row and score a field goal.
ClassFlow
Class Flow: Strategies to Meet Challenges
[Free Registration/Login Required] Challenge is another word for problem solving. In this flipchart students are given the four strategies for problem solving: Explore, plan, solve and reflect.
University of Cambridge
University of Cambridge: Nrich: Scoring With Dice
On this one page website sharpen your logic, multiplication, and multiples skills while working on this challenge. The solution is available to double check your solution.
University of Cambridge
University of Cambridge: Nrich: Divide It Out!
On this one page website sharpen your logic and basic division fact skills while working on this challenge. The solution is available to double check your solution.
University of Waterloo (Canada)
University of Waterloo: Cemc: Math Circles: Exponents [Pdf]
This worksheet provides exercises in writing expressions in exponential form, multiplying and dividing powers, and working with zero and negative exponents. A series of challenging word problems are included.
Other
Roots of Action: How Kids Learn to Take Initiative and Overcome Challenges
Learning to take initiative is a behavior that helps kids navigate their lives with courage and optimism. This article provides insights into how children learn to take initiative. Parents and teachers are key mentors in the process. A...
Mensa Espana
Mensa: Juegos De Ingenio Del Club Mensa (001 005)
Challenge yourself with these five math problems. Each problem is marked by their levels of difficulty.
Mensa Espana
Mensa: Juegos De Ingenio Del Club Mensa (011 015)
Challenge yourself with these five math problems. Each problem is marked according to their levels of difficulty.