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High School Resources

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Mathematics Teacher (MT) focuses on classroom activities and strategies for grades 8-14, deepening mathematical understanding, and linking research to practice.

Read a FREE Preview from the current issue: Counterexamples as Starting Points for Reasoning and Sense Making.


Reflection Guides 
Guidelines for Professional Development Using Publications

NCTM school journals and other publications are a rich resource for professional development. Reflection Guides are written by members of NCTM's Professional Development Services Committee (PDSC).

Featured Reflection Guide - Representation 

Paper Moon: Simulating a Total Solar Eclipse 

Reflect on practice by exploring:

  • How multiple representations can be used to enhance student learning and understanding of student learning
  • How physical, tabular, graphical, verbal, and symbolic representations can be connected in a lesson
  • Connections across the different strands of the curriculum—algebra, geometry, and trigonometry
  • Connections among different subject areas—mathematics, astronomy, and science
  • Use of spreadsheets/technology to analyze data
  • Appropriate use of concrete models to explore mathematical ideas
  • How instruction can incorporate student interactions and feedback
 		 PSSM CoverWhat does NCTM say about High School Standards? 
Access the 9-12 Math Standards here.

 

Agenda For Action CoverAn Agenda for Action
Recommendations for School Mathematics of the 1980s.

The historic document that started the standards movement.

Illuminations Activities
Congruence Theorems

Investigate congruence by manipulating the parts (sides and angles) of a triangle. If you can create two different triangles with the same parts, then those parts do not prove congruence. Can you prove all the theorems? (9-12)

THOUSANDS of Problems
Member access to problem archive of countless problems sorted by topic.

Activities for Students 
Hands-on activities focused on conceptual understanding.
Empowering the Beginning TeacherNew Teacher?

Beginning your journey as a mathematics teacher? This volume has been created to help you reach your full potential as a mathematics educator. Resources cover professional growth, curriculum and instruction, classroom-level assessment, classroom management and organization, equity, and school and community.
More Info 


 

 

Weekly Problem


How many 9s are in the decimal expansion of 999999899992?

Solution:
9. The given number is 1011 − 10001. Its square is 1011(1011 − 20002) + 100020001. The number of 9s in this equals the number of 9s in 1011 − 20002 = 99999979998.

Past Problems