Curated OER
Language Arts: Five Senses Walk
First graders take a discovery walk around the school. They use their observations to compose a class book about their school.
Scholastic
Scholastic: Math Maven's Mysteries: The Cuckoo Caper
The famous Clockenheimer Cuckoo is missing from Clockenheimer Clocks on Main Street! Help Math Maven get it back by solving a math riddle.
CK-12 Foundation
Ck 12: Elem Math: Number Riddles Numbers Up to 100000
[Free Registration/Login may be required to access all resource tools.] Students practice with whole number place value by solving riddles.
Scholastic
Scholastic: Math Maven's Mysteries: The Case of the Mysterious Money Trail
Pat Tern has been buying items all around town using counterfeit money. Help Math Maven identify a pattern to catch her before she deposits fake money into the Cashflow Bank.
TED Talks
Ted: Ted Ed: Can You Solve the Bridge Riddle?
Taking that internship in a remote mountain lab might not have been the best idea. Pulling that lever with the skull symbol just to see what it did probably wasn't so smart either. But now is not the time for regrets because you need to...
TED Talks
Ted: Ted Ed: Can You Solve the Temple Riddle?
Your expedition finally stands at the heart of the ancient temple. But as you study the inscriptions in the darkness, two wisps of green smoke burst forth. The walls begin to shake. The giant sandglass begins flowing with less than an...
Other
Matematicas Para Ninos: El Huevo De Chocolate (The Chocolate Egg)
This resource provides basic math activities in Spanish. Topics include division, math riddles and correcting equations.
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...
Ministry of Education and Employment of Spain
Red Escolar: Problemas De Holmes 2002
In Spanish. Practice your mental math skills with this site. You will find different activities for every month of the year. Different levels of difficulty and suggested time limit for each activity are also provided.
Instituto Latinoamericano de la Comunicacion Educativa
Red Escolar: Problemas De Holmes 2006
In Spanish. Practice your mental math skills with this site. You will find different activities for every month of the year. Different levels of difficulty and suggested time limit for each activity are also provided.
Instituto Latinoamericano de la Comunicacion Educativa
Red Escolar: Problemas De Holmes 2003
In Spanish. Practice your mental math skills with this site. You will find different activities for every month of the year. Different levels of difficulty and suggested time limit for each activity are also provided.
Instituto Latinoamericano de la Comunicacion Educativa
Red Escolar: Problemas De Holmes 2004
In Spanish. Practice your mental math skills with this site. You will find different activities for every month of the year. Different levels of difficulty and suggested time limit for each activity are also provided.
TED Talks
Ted: Ted Ed: Marcus Du Sautoy: Symmetry, Reality's Riddle
Oxford mathematician, Marcus du Sautoy, presents a brief look of the invisible numbers that unite all symmetrical objects as he discusses prime numbers, symmetry groups, higher dimensions and other stumpers. [18:20]
Agnes Scott College
Agnus Scott College: Biographies of Women Mathematicians
Use this site to learn about the women behind the math. Lawrence Riddle, professor of mathematics at Agnes Scott College, created this site as a tribute to women who have made accomplishments in the world of mathematics.
University of Cambridge
University of Cambridge: Nrich: Romantic Riddle
See if you can figure out the solution to this romantic riddle. You can find the solution right at this one page website once you have formulated your own.
PBS
Pbs Learning Media: Logical Leaps: Fractions, Mixed Numbers, and Decimals on the Number Line
In this interactive, students use logic to solve three riddles involving a frog jumping contest and then place the contestants' jumps at the correct points on the number line. Numbers are randomized so that the frogs' placements on the...
PBS
Pbs Learning Media: Logical Leaps: Rational Numbers on the Number Line
In this interactive, use logic to solve riddles involving a wallaby jumping contest. Then, place each contestant's jump -- a fraction, mixed number, or decimal between -5 and +5 -- at the correct point on the number line. Backward jumps...
PBS
Pbs Learning Media: Logical Leaps: Fractions and Decimals From 0 to 1 on the Vertical Number Line
In this interactive, use logic to solve riddles involving a flea-jumping contest. Place each contestant's jump, represented by either a fraction or a decimal in both feet and inches, at the correct point on the vertical number line....
Dartmouth College
Dartmouth College: Mqed: The Hand and the Key
The learning resource explores the mathematical riddles embedded in the walls of a palace.
Other
Northpole: Santa's Classroom
Visit Santa's classroom where you will find fun-filled and engaging activities, printable worksheets, interactive games, and more. A great resource for parents and teachers.
Disfruta Las Matematicas
Disfruta Las Matematicas: Puzzles Con Numeros
This site contains many puzzles dealing with numbers. It could be used as fun supplementary materials. Solutions are also provided.
Disfruta Las Matematicas
Disfruta Las Matematicas: Puzzles De Logica
This site contains many logic puzzles. It could be used as fun supplementary materials. Solutions are also provided.
Cut the Knot
Cut the Knot: 3 Glasses Puzzle
Challenge students to a well-known riddle involving three different-sized glasses, some water, and a goal of a certain amount to be measured out. At this site, students can actually "pour" the water back and forth to solve the problem.
Other
Brain Food: Puzzles for the Brain to Gnaw On
This site includes many games and puzzles ranging from word games to logic problems to riddles. These puzzles can be completed on line and offer interactive hints and solutions.
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