ClassFlow
Class Flow: Geoboards
[Free Registration/Login Required] Geoboards bring challenge into the classroom as the student uses methods to measure length, area, and perimeters of polygons.
ClassFlow
Class Flow: Equations
[Free Registration/Login Required] Students interpret algebraic equations and inequalities geometrically and describe geometric relationships algebraically.
National Council of Teachers of Mathematics
The Math Forum: The Volume of a Pyramid
This question and answer site from the Math Forum with Dr. Math presents a problem dealing with the volume of a pyramid. Links are also provided for additional information on related subjects.
National Council of Teachers of Mathematics
Nctm: Figure This: Cut the Cake
A math challenge where geometry, measurement, and problem solving meet. Explore the properties of three dimensional shapes when you discover how six friends can equally divide a nine inch square chocolate cake. A one page activity from...
ClassFlow
Class Flow: Playing With Shapes
[Free Registration/Login Required] This flipchart is a small lesson for 2nd grade math-geometry. Once students have been introduced to the key vocabulary terms in geometry, the teacher can reinforce those shapes, terms, and some...
National Council of Teachers of Mathematics
The Math Forum: Vectors
This site from the Math Forum of Drexel University contains downloadable sketches and pictures related to vectors. You may need to down-load the Geometer's Sketchpad to view these pages.
University of Toronto (Canada)
Question Corner: Deductive and Inductive Reasoning
A simple discussion of the differences between inductive and deductive reasoning. Helpful to anyone who is having difficulty differentiating between the two.
National Council of Teachers of Mathematics
Nctm: Figure This: Envelopes
Explore tessellations with real world applications in this activity from the NCTM Math Challenges for Families series. Figure out what shape you would use to create a legal envelope from a single sheet of paper. Then discover how...
ClassFlow
Class Flow: Nets
[Free Registration/Login Required] In this flipchart, students explore geometric sense by interacting with plane diagrams that create a three-dimensional shape.
Other
Cram: Math Flashcards
Students can improve their math skills using this collection of 166 million math flashcards on all types and levels of math.
Purple Math
Purplemath: Geometry Word Problems: Introduction
Introduces how to set up and solve simple geometric-figure word problems. Includes advice regarding formulas to memorize.
Microsoft
Microsoft: Choosing an Appropriate Drawing Scale
Drawing objects using a scale. Information on how to choose the right size.
![Houghton Mifflin Harcourt: Saxon Activity Center Real World Investigation: The Geometry of Quilts [Pdf] Activity](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Houghton Mifflin Harcourt: Saxon Activity Center Real World Investigation: The Geometry of Quilts [Pdf] Activity")
Houghton Mifflin Harcourt
Houghton Mifflin Harcourt: Saxon Activity Center Real World Investigation: The Geometry of Quilts [Pdf]
Investigating designs and shapes in quilts around the world is the activity in this internet exploration. Learners will also design their own quilt on paper or on the computer. Acrobat Reader required.
Disfruta Las Matematicas
Disfruta Las Matematicas: Geometria
This unit could be used as supplementary material for Geometry. It has good examples with illustrations and some interactive activities.
ClassFlow
Class Flow: Football Path (Algebra)
[Free Registration/Login Required] Fun game involving designing a football path around the high school using pentagons and hexagons.
Mathigon
Mathigon: Geometry: Triangles and Trigonometry: Introduction
This lesson is an introduction to triangles and trigonometry by looking at the history of mapping and specifically, measuring the height of a mountain.
University of St. Andrews (UK)
University of St. Andrews: Quotation by Apollonius
This site, which is provided for by the University of St. Andrews, contains a quote of Apollonius from the Preface to Book 1 of "Conics."
Ministerio de Educacion, Cultura y Deporte (Spain)
Ite: La Magia De Los Numeros
This site describes the magic of numbers through different mathematicians. Contributions of the following mathematicians: Pierre de Fermat, Pitagoras de Samos, Nicomaco de Gerasa, Diofanto de Alejandria, G. Bachet de Meziriac, Rene...
Rice University
Rice University: Cynthia Lanius: Hidden Polygon Activity
On this site students are instructed to locate different types of polygons on triangle grid paper. This page can be printed so that students can actually draw them. It also gives a definitions link for each polygon.
Ministerio de Educacion, Cultura y Deporte (Spain)
Ite: Jardin Botanico Atlantico De Gijon
Short learning exercise illustrating and comparing geometry and nature.
Integrated Publishing
Plane Figures
This site describes lines and angles "as found in various plane (flat) geometric figures.".
University of Illinois
University of Illinois Urbana Champaign: Torus Math: Spherical Geometry Demo
A java applet on this site illustrates the principles or spherical geometry.
TVOntario
Tvo Kids: Mysteries of Lagoon Bay
This multiplayer board game allows you to learn about patterning, spelling, tangram puzzles and addition. Collect shiny gems raining down from the sky, but beware of lurking sea monsters.