369 mind-stretchers results | sort by:
return to subject listing
Hangman
Grades
4 to 12
tag(s): grammar review (33)
You must be registered and logged in to add items to your favorites.
Use the form at the top of the page to log in, or click here to join TeachersFirst (it's free!).
Nrich - Cambridge University
Grades
1 to 12tag(s): problem solving (285)
Add your comments below (available only to members) | Become a Member
You must be registered and logged in to add items to your favorites.
Use the form at the top of the page to log in, or click here to join TeachersFirst (it's free!).
Cool Math for Kids
Grades
4 to 8Add your comments below (available only to members) | Become a Member
You must be registered and logged in to add items to your favorites.
Use the form at the top of the page to log in, or click here to join TeachersFirst (it's free!).
Brain Explorer
Grades
3 to 7Add your comments below (available only to members) | Become a Member
You must be registered and logged in to add items to your favorites.
Use the form at the top of the page to log in, or click here to join TeachersFirst (it's free!).
Cryptography - Historical Ciphers - Trinity College, Hartford
Grades
6 to 12tag(s): cryptography (5)
In the Classroom
Use this site as a quick lesson during a history or statistics class, in an attempt to teach students about how some ciphers were solved and how it affected history. Peruse a few of the ciphers as a class on the interactive whiteboard, as a challenge have students try to make or solve one on their own! Students can present their ciphers on the interactive whiteboard, and try to stump their peers!Add your comments below (available only to members) | Become a Member
You must be registered and logged in to add items to your favorites.
Use the form at the top of the page to log in, or click here to join TeachersFirst (it's free!).
Anyday
Grades
6 to 12tag(s): quiz (58)
In the Classroom
This site would make for a great creative writing project for students in a high school english class. Have students search for their birth date, and find one person on that list that they can focus their paper on. Have students research their historical person, eventually writing a analytical paper about the similarities and differences between their own life and that of their selected person. Teachers can focus more on similarities to make it more difficult and interesting - but it is a great way to get students thinking about comparing and contrasting.Add your comments below (available only to members) | Become a Member
You must be registered and logged in to add items to your favorites.
Use the form at the top of the page to log in, or click here to join TeachersFirst (it's free!).
Engineering Brain Ticklers -Tau Beta Pi - Tau Beta Pi
Grades
9 to 12tag(s): puzzles (176)
Add your comments below (available only to members) | Become a Member
You must be registered and logged in to add items to your favorites.
Use the form at the top of the page to log in, or click here to join TeachersFirst (it's free!).
Archimedes' Laboratory Puzzles
Grades
6 to 12tag(s): puzzles (176)
Add your comments below (available only to members) | Become a Member
You must be registered and logged in to add items to your favorites.
Use the form at the top of the page to log in, or click here to join TeachersFirst (it's free!).
Buggy and Buddy - Make Your Own Kaleidoscope - Buggy and Buddy - Science for Kids
Grades
2 to 8tag(s): animation (71)
In the Classroom
This would be a good center activity to have with a parent or older buddy helping out.Add your comments below (available only to members) | Become a Member
You must be registered and logged in to add items to your favorites.
Use the form at the top of the page to log in, or click here to join TeachersFirst (it's free!).
MathsChallenge
Grades
6 to 12tag(s): cryptography (5)
In the Classroom
These problems could be used in class as extra challenges or online rewards for completed assignments.Add your comments below (available only to members) | Become a Member
You must be registered and logged in to add items to your favorites.
Use the form at the top of the page to log in, or click here to join TeachersFirst (it's free!).
History of Recording Technology
Grades
6 to 12tag(s): inventors and inventions (89)
In the Classroom
Teachers may want to guide their students' use of this site. This site is a little text-heavy, but would be a great way to show the progression of the music industry over the modern era. Share this site on an interactive whiteboard or projector as an introduction to this unit or as review.Add your comments below (available only to members) | Become a Member
You must be registered and logged in to add items to your favorites.
Use the form at the top of the page to log in, or click here to join TeachersFirst (it's free!).
NRich Online Maths Club
Grades
6 to 12tag(s): puzzles (176)
In the Classroom
Most of the articles on the site are written for teachers, not students. There are some interesting ideas on teaching strategies.Add your comments below (available only to members) | Become a Member
You must be registered and logged in to add items to your favorites.
Use the form at the top of the page to log in, or click here to join TeachersFirst (it's free!).
BrainQuest - Workman Publishing
Grades
4 to 12Add your comments below (available only to members) | Become a Member
You must be registered and logged in to add items to your favorites.
Use the form at the top of the page to log in, or click here to join TeachersFirst (it's free!).
Play SET Online - Set Enterprises
Grades
4 to 12tag(s): logic (176)
Add your comments below (available only to members) | Become a Member
You must be registered and logged in to add items to your favorites.
Use the form at the top of the page to log in, or click here to join TeachersFirst (it's free!).
More Brain Teasers - Hoagies
Grades
1 to 12tag(s): gifted (64)
Add your comments below (available only to members) | Become a Member
You must be registered and logged in to add items to your favorites.
Use the form at the top of the page to log in, or click here to join TeachersFirst (it's free!).
Fooble :: Perplexus - Animus Pactum Consulting
Grades
9 to 12In the Classroom
Teachers will find this one a great source for "extra point stumpers."Add your comments below (available only to members) | Become a Member
You must be registered and logged in to add items to your favorites.
Use the form at the top of the page to log in, or click here to join TeachersFirst (it's free!).
Planetarium: a puzzle-story in twelve weekly installments
Grades
7 to 12Add your comments below (available only to members) | Become a Member
You must be registered and logged in to add items to your favorites.
Use the form at the top of the page to log in, or click here to join TeachersFirst (it's free!).
Word Magnet Puzzles
Grades
6 to 12tag(s): poetry (196), vocabulary (252)
In the Classroom
Try this as a brainstormer in your poetry class, or as a vocabulary builder.Add your comments below (available only to members) | Become a Member
You must be registered and logged in to add items to your favorites.
Use the form at the top of the page to log in, or click here to join TeachersFirst (it's free!).
ChessKids
Grades
4 to 12tag(s): chess (4)
In the Classroom
Use the free sample curriculum to help develop student's cognitive development and critical thinking skills. Download the first version of the curriculum (for free) that is not aligned to the CCSS, but does follow Bloom's Taxonomy and Higher Order Thinking Skills (HOTS).Add your comments below (available only to members) | Become a Member
You must be registered and logged in to add items to your favorites.
Use the form at the top of the page to log in, or click here to join TeachersFirst (it's free!).
MENSA Online Workout - MENSA
Grades
6 to 12tag(s): puzzles (176)
In the Classroom
This site offers a great mental workout for gifted students or other students who seem to need an added challenge in the classroom. Include this site on your teacher website so that such students may access it outside of class.Add your comments below (available only to members) | Become a Member
You must be registered and logged in to add items to your favorites.
Use the form at the top of the page to log in, or click here to join TeachersFirst (it's free!).
Add your comments below (available only to members) | Become a Member
Close comment form