Toggle navigation
Log out
Log in
Join
View Cart
Store
Classroom Resources
Notice and Wonder
The Year Game
Back to School Resources
Math Sightings
Video Lessons
Reasoning & Sense Making Task Library
Student Explorations in Mathematics
Problems of the Week Resources
Problems to Ponder
Illuminations
Figure This!
Continuing the Journey
Activities with Rigor & Coherence - ARCs
Designing Innovative Lessons and Activities
Publications
Books
Featured Books
Mathematics Teacher: Learning and Teaching PK-12
Journal for Research in Mathematics Education
Mathematics Teacher Educator
Legacy Journals and Blogs
“Best of” Issues
Institutional Subscriptions
Write, Review, Referee
Advertise
Rights and Permissions
JRME Editor Search
Standards & Positions
Principles to Actions
Common Core State Standards
Principles and Standards
Standards for Mathematics Teacher Preparation
Curriculum Focal Points
Focus in High School Mathematics
More NCTM Standards
Position Statements
Catalyzing Change
Advocacy
Policies and Recommendations
Advocacy Toolkit
Advocacy and Legislation
ESSER - District Solutions
Every Student Succeeds Act - ESSA Toolkit
NCTM Social Justice and Equity Resources
Research
Research Briefs & Clips
Linking Research & Practice
Research Conference
Research Monographs
Journal for Research in Mathematics Education
Continuing the Journey
Conferences & Professional Development
NCTM Annual Meeting and Exposition
Professional Development Resources
Regional Conferences & Expositions
Research Conference
Virtual Conferences
Past and Future Events
Be a Speaker
Webinars
Professional Services
Webcast Library
Exhibit, Advertise, Sponsor
NCTM District Solutions
NCTM Teacher Education Program Review Training
Implementing the Common Core Standards for Mathematical Practice
Grants & Awards
Funding Opportunities
About Mathematics Education Trust
Browse All Grants
Giving Opportunities
Special Events
Lifetime Achievement Award
Social Justice and Mathematics
Membership
Individuals
Schools and Districts
Group Content Access
About
Affiliates
News & Calendar
Career Center
Get Involved
Support Us
MyNCTM
About
Affiliates
News & Calendar
Career Center
Get Involved
Support Us
MyNCTM
Log In
About
Affiliates
News & Calendar
Career Center
Get Involved
Support Us
MyNCTM
Join Now
View Cart
NCTM Store
Toggle navigation
MENU
Classroom Resources
Notice and Wonder
The Year Game
Back to School Resources
Math Sightings
Video Lessons
Reasoning & Sense Making Task Library
Student Explorations in Mathematics
Problems of the Week Resources
Problems to Ponder
Illuminations
Figure This!
Continuing the Journey
Activities with Rigor & Coherence - ARCs
Designing Innovative Lessons and Activities
Publications
Books
Featured Books
Mathematics Teacher: Learning and Teaching PK-12
Journal for Research in Mathematics Education
Mathematics Teacher Educator
Legacy Journals and Blogs
“Best of” Issues
Institutional Subscriptions
Write, Review, Referee
Advertise
Rights and Permissions
JRME Editor Search
Standards & Positions
Principles to Actions
Common Core State Standards
Principles and Standards
Standards for Mathematics Teacher Preparation
Curriculum Focal Points
Focus in High School Mathematics
More NCTM Standards
Position Statements
Catalyzing Change
Advocacy
Policies and Recommendations
Advocacy Toolkit
Advocacy and Legislation
ESSER - District Solutions
Every Student Succeeds Act - ESSA Toolkit
NCTM Social Justice and Equity Resources
Research
Research Briefs & Clips
Linking Research & Practice
Research Conference
Research Monographs
Journal for Research in Mathematics Education
Continuing the Journey
Conferences & Professional Development
NCTM Annual Meeting and Exposition
Professional Development Resources
Regional Conferences & Expositions
Research Conference
Virtual Conferences
Past and Future Events
Be a Speaker
Webinars
Professional Services
Webcast Library
Exhibit, Advertise, Sponsor
NCTM District Solutions
NCTM Teacher Education Program Review Training
Implementing the Common Core Standards for Mathematical Practice
Grants & Awards
Funding Opportunities
About Mathematics Education Trust
Browse All Grants
Giving Opportunities
Special Events
Lifetime Achievement Award
Social Justice and Mathematics
Membership
Individuals
Schools and Districts
Group Content Access
Sulis Sense
Log In
Not a member?
Join Now
Classroom Resources
/
Problems of the Week