Cut the Knot
Cut the Knot: Probability Questions
This site defines probability and has a computer-based random number generator. The site has links to more than 100 probability problems which require some prior statistical knowledge to solve, or they can be great "openers" for teachers...
Hooda Math
Hooda Math: Hooda Stacker
Hooda Math games provide students extra practice in a variety of math skills. This game focuses on CCSS.Math.Practice.MP1 Make sense of problems and persevere in solving them and CCSS.Math.Practice.MP8 Look for and express regularity in...
Math Is Fun
Math Is Fun: Algebra
Through this collection of definitions, lessons, problem-solving steps and strategies, and example questions, you'll learn why completing an algebra problem is a lot like solving a puzzle. After viewing introductory material and basic...
Ministry of Education and Employment of Spain
Red Escolar: El Crucigrama De Hipatia
In Spanish. Hypatia of Alejandria was a great mathematician that from an early age taught and investigated almost all branches of mathematics. To remember her solve the crossword puzzle involving problems of arithmetic, geometry and...
Maths Challenge
Maths challenge.net: Square Laminas
Solve this square lamina problem using your visualization skills and other mathematical prolem solving strategies.
University of Cambridge
University of Cambridge: Nrich: 1 Step 2 Step, Fibonacci
See if you can find the patterns on the staircase. Mr. Fibonacci would be so proud to know you found the solution. You can check your solution right at this nifty one-page website.
Quia
Quia: Division Facts Matching
Use this website to practice division facts using a matching game format.
Harvey Mudd College
Mudd Math Fun Facts: Magic Squares, Indeed!
This tutorial provides a definition and examples of a "magic square" and then shows a proof and generalizations.
Harvey Mudd College
Mudd Math Fun Facts: Squares Ending in 5
This math tutorial features an exercise in which you are given any two-digit number that ends in 5 and then square it in your head.
Lesson Tutor
Lesson Tutor: A Beginning Look at Basic Algebra
Twelve lessons are provided as an introduction to basic algebra. Each covers the topic clearly, providing examples with explanations as well as practice problems and their solutions for the user. Topics highlighted here include: solving...
University of Cambridge
University of Cambridge: Nrich: Super Value Codes
On this one page website sharpen your logic and addition skills while working on this challenge. The solution is available to double check your solution.
Cut the Knot
Cut the Knot!: Shapes of Constant Width
Description of what constant width means along with the question "are there shapes of constant width?". [Requires Java.]
PBS
Wgbh: Peep and the Big Wide World: Games: Quack's Apples
Students are challenged to position sticks creating a path so apples land into the pond.
Information Fluency
Imsa 21 Cif Portal: Search Challenges
Sharpen your skills with these Search Challenges. Test your strategies and tactics as you attempt to solve puzzling Internet research problems efficiently and effectively. Choose from multi-leveled games that feature various themes...