Maths Challenge
Maths challenge.net: Problem Solving Database
Need some challenging problem-solving work for your students in the following areas: Discrete, Geometry, Numbers, and Code Breaking? This is the place for an enormous database of problems aimed at high school age students. They are...
University of Canterbury
University of Canterbury: Cs Unplugged: Minimal Spanning Trees
This puzzle shows students the decisions involved in linking a network between houses in a muddy city. It can lead on to a discussion of minimal spanning tree algorithms for optimizing networks.
San Jose State University
San Jose State University: Categorical Fun
Six logical problems are defined to challenge students to use critical thinking skills as they tackle these brain-teasers. No answers are provided, but there are some instructions for how to approach the problems.
ABCya
Ab Cya: Blue Box
In a very blue world of a very square box, there is green, red and blue, and a puzzle to solve. Help move the bouncing blue box from the green box to the red box. Both children and parents will find tons of fun in this addicting puzzle...
ABCya
Ab Cya: Panic in Pet Paradise
It's pandemonium at Pet Paradise Hotel! The picky pets are quite particular about where they are staying. Can you figure out the puzzle correctly so that each dog, cat, mouse and bird is happy?
ABCya
Ab Cya: Zippy Boxes
Zippy Boxes is a fun stress-free puzzle game that will keep you entertained for hours. Move the colored boxes to the square containing the same colored key to unlock the crazy creature trapped inside. Parents and children will have a...
ABCya
Ab Cya: Blobble
Blobble is slimy strategy puzzle game that will keep you slipping and sliding for hours! The goal is to fill an entire space with blobs, using only the tools available in each level. Do you have what it takes to complete all 45 levels?
TED Talks
Ted: Ted Ed: Can You Solve the Counterfeit Coin Riddle?
You're the realm's greatest mathematician, but ever since you criticized the Emperor's tax laws, you've been locked in the dungeon. Luckily for you, one of the Emperor's governors has been convicted of paying his taxes with a counterfeit...
ABCya
Ab Cya: Alarmy 2
Alarmy is back in this fun physics based puzzle game! Kids of all ages can help Alarmy wake up more of his fuzzy friends. Alarmy 2 is packed full of new challenges and obstacles. Do you have what it takes to collect all 72 stars?
TED Talks
Ted: Ted Ed: Should You Trust Unanimous Decisions?
Imagine a police lineup where ten witnesses are asked to identify a bank robber they glimpsed fleeing the scene. If six of them pick the same person, there's a good chance that's the culprit. And if all ten do, you might think the case...
TED Talks
Ted: Ted Ed: Can You Solve the Dark Coin Riddle?
As a world-renowned treasure hunter, you have been searching for the legendary dungeon containing the stash of ancient Stygian coins. The wizard who owns the castle has even allowed you to have them, on one condition you must solve his...
ABCya
Ab Cya: Mythical Jewels
A whole treasure chest awaits and diamonds & emeralds abound in this glittering Match-3 puzzle game. Create bigger matches for awesome boosts! Can you reach a high score before you run out of moves?
University of Cambridge
University of Cambridge: Nrich: A Puzzling Cube
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.
PBS
Pbs Kids: Design Squad: Build
Do you like to build and create new things? Check out this collection of 48 different engineering activities providing opportunities for creative building using things around the house. These include activities like spinning, rubber band...
PBS
Pbs Kids: Design Squad: Build: Spinner
What can you build with things around the house? Select what you would like to make, click on three items you have and want to use, and click on the spinner to get ideas and instructions.
PBS
Pbs Kids: Design Squad: Build: Sky Glider
Can you build a blimp (airship) that travels in a straight path across the room? Give this one a try.
PBS
Pbs Kids: Design Squad: Build: Zip Line
Your job is to design and build a ping-pong carrier and send it down a zip line in 4 seconds or less. Are you up to the task?
PBS
Pbs Kids: Design Squad: Build: Helping Hand
Can you design and build a device that will let you grab and drop objects from at least two feet away? Give it a try!
Scholastic
Scholastic: I Spy
These interactive matching games for elementary age students combine visuals of familiar objects and rhyming riddles to create brain-teasing puzzles.
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.
TED Talks
Ted: Ted Ed: How High Can You Count on Your Fingers? Spoiler:much Higher Than 10
How high can you count on your fingers? It seems like a question with an obvious answer. After all, most of us have ten fingers- or to be more precise, eight fingers and two thumbs. This gives us a total of ten digits on our two hands,...
TED Talks
Ted: Ted Ed: Can You Solve the Airplane Riddle?
Professor Fukano, the famous scientist, has embarked on a new challenge - piloting around the world in a plane of his own design. There's just one problem: there's not enough fuel to complete the journey. Luckily, there are two other...
TED Talks
Ted: Ted Ed: Can You Solve the River Crossing Riddle?
As a wildfire rages through the grasslands, three lions and three wildebeest flee for their lives. To escape the inferno, they must cross over to the left bank of a crocodile-infested river. Can you help them figure out how to get across...