These resources are organized under topics. Click the found next to the topic to see the related knowledge and skill statements from Content Knowledge, 4th edition.

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Addition/subtraction

• The Abacus - Luis Fernandes*

Analytic geometry

• Geometry Problem of the Week - Math Forum @ Drexel; Philadelphia, PA

Data collection and sampling

• American Statistical Association - Alexandria, VA

Equations and inequalities

• The Equality Sisters - Richard L. Meehan; Stanford University, California
• Experiment and Explore Mathematics - Dr. A. Dendane; United Arab Emirates University*

Functions

• Experiment and Explore Mathematics - Dr. A. Dendane; United Arab Emirates University*

Graphs and graphing systems

• Create a Graph - National Center for Graphing Statistics
• StarLogo: A Programmable Modeling Environment - MIT Media Laboratory; Cambridge, MA

Mathematical enterprise

• The MacTutor History of Mathematics - University of St Andrews, Scotland
• The Proof: Fermat's Last Theorem - PBS Online®
• Women Mathematicians - Agnes Scott College; Atlanta, GA

Measurement estimation

• Math Around Us - Kindlink®

Multiplication/division

• The Abacus - Luis Fernandes*

Patterns

• The Dance of Chance - Center for Polymer Studies & Boston Museum of Science, Massachusetts
• The Dynamical Systems and Technology Project - Boston University, Massachusetts
• Fibonacci Numbers & the Golden Section - Dr. Ron Knott; Surrey University; Guildford, UK
• MegaMath - Los Alamos National Laboratory, New Mexico
• The Pentominos Page - Jay Jenicek; San Antonio, TX*
• The Spanky Fractal Database - Noel Giffin; Canada's National Laboratory for Particle and Nuclear Physics
• Tesselation Tutorials - Suzanne Alejandre; Math Forum @ Drexel; Philadelphia, PA

Perimeter/area/circumference

• Areas, Volumes, and Surface Areas - David Manura
  

Representing problems

Shapes and figures

• The Pentominos Page - Jay Jenicek; San Antonio, TX*
• Polyhedra - Math Forum @ Drexel; Philadelphia, PA
  
• Virtual Reality Polyhedra - George W. Hart; Northport, NY

Whole numbers/place value/numeration

• Place-Value: Problem-Solving and Written Assessment Using Digit-Correspondence Tasks - Sharon Ross & Elisa Sunflower; California State University, Chico
• The Prime Page - Chris Caldwell; University of Tennessee at Martin
  

General mathematics resources

• Ask Dr. Math™ - Math Forum @ Drexel; Philadelphia, PA
• Developing Educational Standards: Math - Charles Hill & Wappingers Central School District, New York
• Elementary School Teachers' Place - The Math Forum @ Drexel; Philadelphia, PA
• Great Explorations in Math and Science - University of California, Berkeley
• Internet Mathematics Library - The Math Forum @ Drexel; Philadelphia, PA
• Math Archives - University of Tennessee, Knoxville
• Math Central - University of Regina, Canada
• Math and Children's Literature - Carol Hurst & Rebecca Otis; Westfield, MA
• Math Teacher Link - University of Illinois at Urbana-Champaign
• Mathematical Quotations Server - Furman University; Greenville, SC
• The Math Forum - Math Forum @ Drexel; Philadelphia, PA
• Math and Science Resources - South Carolina Statewide Systemic Initiative
• National Council of Teachers of Mathematics (NCTM) - Reston, VA
• NASA's Center for Distance Learning - NASA Langley Research Center Office of Education
• Trends in International Mathematics and Science Study (TIMMS) - National Center for Education Statistics; Washington, D.C.

Note: An asterisk (*) denotes a resource that is listed under more than one topic.