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*
• Mr. Martini's Classroom: Math Practice—Stanley Jurewicz*
  

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

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

• Links Learning—Links Learning; Olympia, WA

Multiplication/division

• The Abacus—Luis Fernandes*
• Mr. Martini's Classroom: Math Practice—Stanley Jurewicz*

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
• Pentominos—Jürgen Köller*
• 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

• Pentominos—Jürgen Köller*
• 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

• AAA Math—John Banfill; Albuquerque, New Mexico
• Algebasics—Atlantic Beach, FL
• Algebra – Class.com—Karin Hutchinson, FL
• Algebra Help—James W. Brennan
• Algebra.help—John R. Mishanski
• AplusMath—Walt Disney Internet Group  
• Ask Dr. Math™—Math Forum @ Drexel; Philadelphia, PA
• Dave’s Short Trig Course—David E. Joyce; Clark University
• 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 League - Geometry—Math League Press
• Math Teacher Link—University of Illinois at Urbana-Champaign
• Mathematical Quotations Server—Furman University; Greenville, SC
• The Math Forum—Math Forum @ Drexel; Philadelphia, PA
• Multiplication.com—Krimsten Publishing; Prosser, WA  
• National Council of Teachers of Mathematics (NCTM)—Reston, VA
• 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.