Provides electronic examples to help students understand NCTM's standards. Organized as follows: Prekindergarten through Grade 2 4.1. Creating, Describing, and Analyzing Patterns to Recognize Relationships and Make Predictions 4.2 Investigating the Concept of Triangle and Properties of Polygons 4.3 Learning Geometry and Measurement Concepts by Creating Paths and Navigating Mazes 4.4 Developing Geometry Understandings and Spatial Skills through Puzzlelike Problems with Tangrams 4.5 Learning about Number Relationships and Properties of Numbers Using Calculators and Hundred Boards 4.6 Developing Estimation Strategies by Making Connections among Number, Geometry, Measurement, and Data Concepts Grades 3–5 5.1 Communicating about Mathematics Using Games 5.2 Understanding Distance, Speed, and Time Relationships Using Simulation Software 5.3 Exploring Properties of Rectangles and Parallelograms Using Dynamic Software 5.4 Accessing and Investigating Data Using the World Wide Web 5.5 Collecting, Representing, and Interpreting Data Using Spreadsheets and Graphing Software Grades 6–8 6.1 Learning about Multiplication Using Dynamic Sketches of an Area Model 6.2 Learning about Rate of Change in Linear Functions Using Interactive Graphs 6.3 Learning about Length, Perimeter, Area, and Volume of Similar Objects Using Interactive Figures 6.4 Understanding Congruence, Similarity, and Symmetry Using Transformations and Interactive Figures 6.5 Understanding the Pythagorean Relationship Using Interactive Figures 6.6 Comparing Properties of the Mean and the Median through the use of Technology Grades 9–12 7.1 Learning about Properties of Vectors and Vector Sums Using Dynamic Software 7.2 Using Graphs, Equations, and Tables to Investigate the Elimination of Medicine from the Body 7.3 Understanding Ratios of Areas of Inscribed Figures Using Interactive Diagrams 7.4 Understanding the Least Squares Regression Line with a Visual Model 7.5 Exploring Linear Functions: Representational Relationships