Interactive
ABCya

Ab Cya: Zero Sum

For Students 3rd - 6th
Welcome to Zero Sum, a fun math-puzzle game! Drag the tiles over the target numbers to reduce their values to zero. Be careful to make sure that none of the target numbers get reduced below zero. If you get stuck, use the reset button to...
Interactive
ABCya

Ab Cya: Mystic Numbers

For Students 3rd - 5th
Enter the Mystical Temple and discover hidden treasure by placing the number orbs in the correct spots on the pedestal. Great addition skills are essential in this exciting math puzzle game. Give it a try!
Activity
National Institute of Educational Technologies and Teacher Training (Spain)

Ministerio De Educacion: El Sistema Decimal De Numeracion

For Students 3rd - 5th Standards
Practice your knowledge of different number systems with the interactive example then check your knowledge with the different exercises.
Activity
Maths Challenge

Maths challenge.net: Pentominoes

For Students 3rd - 8th
A "one star" geometry problem that requires problems solving skills and exercises ones visual-spatial abilities. One may want to cut out the pieces to solve the problem as a puzzle.
Activity
National Council of Teachers of Mathematics

Nctm: Figure This: Number Tricks

For Students 3rd - 8th Standards
Can you break the magic number code? Test your algebra aptitude in this challenge that explores number generalizations, symbols, and equations. Discover how algebraic procedures are used in everyday situations in this one page activity...
Activity
K-5 Math Teaching Resources

K 5 Math Teaching Resources: The Product Is [Pdf]

For Students 3rd - 5th
Given some clues the students are to find the possible solutions.
Whiteboard
ClassFlow

Class Flow: Mental Math

For Teachers 5th - 7th
[Free Registration/Login Required] This flipchart is a group of one page starter exercises that require students to use logic to find the solution.
Website
PBS

Pbs Learning Media: The Puzzle of the Amulet of Amagansett

For Students 3rd - 8th
In this video segment from Cyberchase, Wicked and Digit use what they know about fractions to figure out how many jewels are missing from the Amulet of Amagansett.
Website
Enchanted Learning

Enchanted Learning: All About Whales

For Students 2nd - 7th
This site provides a great deal of information about whales.
Interactive
University of Cambridge

University of Cambridge: Nrich: Got It

For Students 1st - 8th
Sharpen your logical thinking and see if you can figure out the strategy to get to the target number before the computer.
Graphic
University of Cambridge

University of Cambridge: Nrich: A Cartesian Puzzle

For Students 3rd - 8th Standards
This one page website lets you practice plotting points on the coordinate grid. See if you can find the missing coordinates to complete the shapes. When you are finished the solutions are only a click away.
Activity
University of Cambridge

University of Cambridge: Nrich: A Puzzling Cube

For Students 3rd - 8th
See if you can figure out which symbols are on which cube face at this one page website. The solution is just a click away once you have your solution in mind.
Website
Rice University

Rice University: Cynthia Lanius: Geometry Online

For Students 4th - 8th
This is a site for geometry lovers. Chock-full of puzzles, games, interesting geometry facts, and online activities.
Website
PBS

Pbs Learning Media: Cyberchase: Fixing the Teleporter Part 1

For Students 3rd - 8th
In this Cyberchase video, the Teleporter breaks and the CyberSquad must try to fix it using clues given to them by Ms. Fileshare. This is one in a series of two problem-solving videos. [3:49]
Website
PBS

Pbs Learning Media: Making Popcorn Balls (Multiplication)

For Students 3rd - 8th
In this Cyberchase video segment, Bianca uses multiplication to help her adjust the recipe for popcorn balls.
Website
PBS

Pbs Learning Media: Transporting to Ms. Fileshare

For Students 3rd - 8th
In this video segment from Cyberchase, the CyberSquad tries to reach Ms. Fileshare by using a 3 x 3 matrix to figure out the various ways they can travel to her.
Activity
University of Cambridge

University of Cambridge: Nrich: Clever Santa

For Students 3rd - 8th
Help Santa figure out how many puzzles and books to leave for the children of this family. Once you figure it out you can check the solution.
Lesson Plan
Alabama Learning Exchange

Alex: Tangram Fractions

For Teachers 3rd - 5th
The teacher will engage the class by reading Grandfather Tang. Students will solve a tangram puzzle. Students will find the fractional value for each piece of the tangram. Students will create a picture using the pieces of the tangram....
Interactive
University of Cambridge

University of Cambridge: Nrich: Game Fifteen

For Students 1st - 5th
Sharpen your problem solving and strategy skills playing this interactive game, Fifteen. The rules are simple but the game requires some thinking if you want to beat the computer. There is a "Printable Page," link if you want to print it...
Activity
University of Cambridge

University of Cambridge: Nrich: 1 Step 2 Step, Fibonacci

For Students 3rd - 8th Standards
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.
Activity
University of Cambridge

University of Cambridge: Nrich: Seven Pots of Plants

For Students 3rd - 8th
On this one page website sharpen your logic skills while working on this flower pot labels mix up challenge. The solution is available to double check your solution.
Activity
University of Cambridge

University of Cambridge: Nrich: Gnomon 1

For Students 3rd - 8th Standards
This interactive activity gives you an opportunity to explore a specific number pattern named the "Fibonacci sequence." See what other patterns you can discover while you manipulate the blocks. There is a "Printable Page" link if you...
Lesson Plan
Shodor Education Foundation

Shodor Interactivate: Lesson: Clock Arithmetic and Cryptography

For Teachers 3rd - 8th Standards
This lesson plan is designed to guide students in practicing their basic arithmetic skills by learning about clock arithmetic and cryptography. Linked resources include helpful applets.
Interactive
ABCya

Ab Cya: Tangrams

For Students 4th - 7th Standards
Students attempt to make various shapes by rearranging the geometric shapes to form a tangram.

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