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These free web-based apps are perfect for demonstrating concepts like fractions and geometry. Number line tools work great on the SMART Board and on students' devices.

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Sharing in an app allows educators to pose problems and investigations for students by using an 8-character code or link. Students can share their thinking with their teachers and classmates. Share codes remain available for continued use for 18 months from the date they are last accessed.
Watch the video to learn how sharing works.

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Sharing in an app allows educators to pose problems and investigations for students by using an 8-character code or link. Students can share their thinking with their teachers and classmates. Share codes remain available for continued use for 18 months from the date they are last accessed.

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WODB is fantastic for promoting mathematical discourse in the classroom. I start many lessons with these visual prompts, and they really get students thinking critically about mathematical properties. The discussions we have are always rich and engaging.

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This is Which One Doesn't Belong?, a website dedicated to providing thought-provoking puzzles for math teachers and students alike. There are no answers provided as there are many different, correct ways of choosing which one doesn't belong. Enjoy!

Which One Doesn't Belong?

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This is Which One Doesn't Belong?, a website dedicated to providing thought-provoking puzzles for math teachers and students alike. There are no answers provided as there are many different, correct ways of choosing which one doesn't belong. Enjoy!

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This site provides challenging math problems that have multiple solution paths. Perfect for differentiation and promoting problem-solving skills.

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Home

CHALLENGING MATH PROBLEMS WORTH SOLVING

DOWNLOAD OUR FAVORITE PROBLEMS FROM EVERY GRADE LEVEL

WANT GOOGLE SLIDE VERSIONS OF ALL PROBLEMS?

HERE'S OUR GROWING COLLECTION

WANT TO SHARE OPEN MIDDLE WITH OTHERS?

CHECK OUT THESE FREE WEBINARS TO HELP TEACHERS RETHINK CLASSWORK

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CHALLENGING MATH PROBLEMS WORTH SOLVING DOWNLOAD OUR FAVORITE PROBLEMS FROM EVERY GRADE LEVEL Get Our Favorite Problems Take The Online Workshop WANT GOOGLE SLIDE VERSIONS OF ALL PROBLEMS? HERE’S OUR GROWING COLLECTION Get Google Slide Versions WANT TO SHARE OPEN MIDDLE WITH OTHERS? CHECK OUT THESE FREE WEBINARS TO HELP TEACHERS RETHINK CLASSWORK Elementary Version

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While it's American-based, the National Council of Teachers of Mathematics' Illuminations site offers excellent lesson plans and interactive tools. Resources can be adapted to the Ontario classroom.

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Illuminations Home - National Council of Teachers of Mathematics

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Knowledgehook - Change how children feel about math. Many diagnostic tooks available. Information on common misconceptions among students.  

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Free, fun, and effective
math software for the classroom.

Fully Curriculum-Aligned K-10 Assessments

Differentiate your math class with consistent quality assessments that meet the pedagogical standards required by school boards.

District-Stamped Classroom Fun

Confidently engage your students with the excitement of popular game-based learning, fortified by the learning science that school boards trust.

Learn more on how we engage students

Goodbye Empty Dashboards

Rely on classroom dashboards that tell the full story with unmatched assignment completion rates and a vibrant view of your students' progress.

Transform how you teach with Classroom Connected Professional Learning. ClassOS Pro is designed around your unique classroom challenges.

Explore ClassOS Pro

Uniting Classroom Insights with Home Tutoring

Introduce parents to a tutoring solution that aligns with your teaching, ensuring students receive consistent, affordable, and quality support.

Learn more about KH After School

Privacy Matters

At Knowledgehook, we make sure to maintain each and every student's privacy in all products. See how we protect students, teachers, and parents

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Knowledgehook - Change how children feel about math

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Experience engaging math lessons with Knowledgehook. Perfect for classrooms, at-home learning, and districts. Free for teachers. Start today!

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Interactive teaching tutorials for students. Built in practice opportunities.

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A required part of this site couldn’t load. This may be due to a browser extension, network issues, or browser settings. Please check your connection, disable any ad blockers, or try using a different browser.

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IXL Math aligns with our curriculum and provides detailed analytics on student progress. The adaptive questions ensure each student works at their appropriate level.

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Discover thousands of math skills covering pre-K to 12th grade, from counting to calculus, with infinite questions that adapt to each student's level.

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Three part math lessons with low floor/high ceiling tasks. MathUP is designed to help you meet the 2020 Ontario Math curriculum as well as align with other ministry initiatives such as Growing Success.

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Provides virtual interactive manipulatives and assessment tools for teachers and students.

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Our online teacher tools include a wide range of interactive manipulatives and assessment tools to teach and assess basic math concepts. Additional teacher tools help teach literacy and reading skills. Plus, check out our online timers, spinners, and dice that assist with classroom management.

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Teacher Tools " Toy Theater | Learn * Create * Play

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Our online teacher tools include a wide range of interactive manipulatives and assessment tools to teach and assess basic math concepts. Additional teacher tools help teach literacy and reading skills. Plus, check out our online timers, spinners, and dice that assist with classroom management.

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Number talk resource to help students strengthen fluency and mental math strategies. Free lessons and games for educators.

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Teacher: Time for our morning Number Talk.
Everyone consider this question. (She writes 9 + 17 on the board).
(A student starts waving his arm in the air.) When you have the answer, show me with a thumb at your chest. (The student puts his arm down and holds up a thumb.)
If you get more answers, show me by holding up more fingers. (She waits for 30 seconds. Several students are holding up multiple fingers, though many have just a thumb.
The teacher is noting to see if anyone hasn't solved the problem-this is a great opportunity for formative assessment.
Finally, she begins calling on students for their answers, starting with those who have only one solution.)

Teacher: Lucy?
Lucy: 26. (Teacher writes 26 on the board.)

Teacher: Charles?
Charles: 107 (Teacher writes 107 on the board.)

Teacher: Michelle?
Michelle: 25. (Teacher writes 25 on the board.)

Teacher: Any other answers? (No one has any.)
Who would like to explain how they got their answer? Tyrone?
(The teacher records what the students write as they explain.)

Tyrone: I know that 9 + 7 is 16, and then I added another 10 to get 26.
Sarah: 10 + 17 is 27, and 10 is 1 more than 9, so 9 + 17 must be 26.
Charles: 9 + 1 is 10, and then you put a 7 after, so it's 107.
Lucy: I counted one by one, but I just realized that I miscounted.
I agree with 26
(Teacher crosses out 25 and replaces it with 26.)
Sam: I respectfully disagree with Charles.
You can't add the 9 + 1 because the 1 stands for 10.
Charles: But that's how you add. I did it right.
(Teacher lets conversation continue until class consensus, or near-consensus, is reached.
Meanwhile, she's noting where students are in their understanding of place value and addition.)

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Teacher: Time for our morning Number Talk. Everyone consider this question. (She writes 9 + 17 on the board). (A student starts waving his arm in the air.) When you have the answer, show me with a thumb at your chest. (The student puts his arm down and holds up a thumb.)

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Understanding and Developing Student Thinking in Early Numeracy.

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Making Math Meaningful to Canadian Students K-8

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Up to 90% off Textbooks at Amazon Canada. Plus, free two-day shipping for six months when you sign up for Amazon Prime for Students.

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Peter Sullivan (Author), Pat Lilburn (Author)

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Good Questions for Math Teaching: Why Ask Them and What to Ask, Grades K-5

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Up to 90% off Textbooks at Amazon Canada. Plus, free two-day shipping for six months when you sign up for Amazon Prime for Students.

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Mastering the Basic Math Facts in Addition and Subtraction: Strategies, Activities, and Interventions to Move Students Beyond Memorization : O’Connell, Susan, Sangiovanni, John: Amazon.ca: Books

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Number Talks: Helping Children Build Mental Math and Computation Strategies, Grades K-5

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Up to 90% off Textbooks at Amazon Canada. Plus, free two-day shipping for six months when you sign up for Amazon Prime for Students.