Wolfram Research
Wolfram Math World: World's Most Extensive Mathematics Resource
MathWorld provides a huge mathematics encyclopedia detailing the concepts of geometry, algebra, calculus, discrete math, number theory, and other math topics--complete with formulas, diagrams, examples, and references for thorough...
National Council of Teachers of Mathematics
The Math Forum: Suzanne's Mathematics Lessons 2001
This site by Suzanne Alejandre offers lesson plans, activities and resources covering topics in algebra, geometry, data analysis, number & operations, and measurement. The contents of this site are aligned with the NCTM standards and...
Science Education Resource Center at Carleton College
Serc: Merlot Mathematics Portal: Symmetry and Tilings: An Exploration
A geometry lesson where students read about tilings and tessellations, answer some questions, then explore them using an online interactive. Afterwards, they share and apply their learning in discussion and by examining other tilings.
University of Saskatchewan (Canada)
University of Saskatchewan: Geometry
The University of Saskatchewan's Department of Mathematics and Statistics provides high school students with online tutorials and exercises on what they deem some of the most important topics in geometry: Triangles, and Circles and Other...
University of Regina (Canada)
University of Regina: Math Central: Introduction to Slope for Middle Years Mathematics
This collection of five middle school math lessons covers the topic of plane geometry, specifically the concept of slope. The first activity introduces learners to plotting points on a Cartesian grid using a Geoboard. Lesson two moves...
Other
Kodak Lesson Plans: Math
Kodak's site has five lesson plans integrating photography into math lessons. Activities involve geometry and other math concepts for fourth grade on up.
PBS
Pbs Mathline: Bubble Mania Lesson Plan [Pdf]
Determine the area, diameter, and circumerfence of a bubble residue by creating a soap solution and blowing bubbles.
Other
Nearpod: Mixed Review & Practice: Geometry
In this lesson on reviewing fifth-grade geometry concepts, 5th graders learn about the mathematical domain, explain why it is important, and complete a variety of practice problems.
Better Lesson
Better Lesson: Geometry Assessment
Sixth graders solve real-world and mathematical problems involving area, volume and surface area.
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Smile: Smile Program Mathematics Index
This site provides lesson plans for various math topics, including probability, geometry, algebra, trigonometry, patterns, applied math.
Savvas Learning
Hmong Embroidery Connections to Mathematics
This short activity uses the art of Hmong "flower cloth" (paj ntaub) to help learners learn about symmetry. Includes two suggested children's books you can use to learn more about Hmong culture.
Interactive Mathematics
Interactive Mathematics: The Ellipse
This excellent lesson offers a thorough definition, description, and then step-by-step analysis of ellipses. Includes a focus upon the vertical and horizontal, major and minor axes, transllations of ellipses and more.
Shodor Education Foundation
Shodor Interactivate: Lesson: Fractals
This site provides some links to activities and lesson plans dealing with fractals and chaos.
University of Texas at Austin
Mathematics Teks Toolkit: Mathematical Models With Applications
In this lesson, students use geometry software to create a two-point perspective drawing.
Alabama Learning Exchange
Alex: Cutting the Cheese
The learners will find the area of each two dimensional figure on a net of a triangular prism. In groups, students will cut out the net and create a triangular prism. Groups will then discuss how to find the lateral area and the total...
Alabama Learning Exchange
Alex: Nifty Nets
During this activity, students will create nets for prisms. They will find the volume and surface area of the shapes. They will also use interactive activities to review three-dimensional shapes.This lesson plan was created as a result...
Alabama Learning Exchange
Alex: Painting the Pyramids
The students will find the area of each two dimensional figure on a net of a square pyramid. In groups, students will cut out the net and create a square pyramid. Groups will then discuss how to find the lateral area and the total...
Crayola
Crayola: Exploring Triangles.
Here's a great geometry activity to display young scholars' knowledge of the different types of triangles. Provides resources and adaptations to supplement this lesson. (To access this lesson plan, you must register with Crayola.com....
CK-12 Foundation
Ck 12: Geometry: Inductive Reasoning From Patterns
[Free Registration/Login may be required to access all resource tools.] Use inductive reasoning to solve problems.
CK-12 Foundation
Ck 12: Geometry: Inductive Reasoning From Patterns
[Free Registration/Login may be required to access all resource tools.] This concept introduces students to inductive reasoning and provides many examples of inductive reasoning.
University of Regina (Canada)
University of Regina: Math Central: Manipulatives for the Upper Elementary (Gr. 4 6)
Many teachers find it more challenging to incorporate the use of manipulatives into their mathematics programs at the upper elementary or middle school grades. Activities using manipulatives are provided for grades four, five, and six...
Utah Education Network
Uen: Shape Stretch
This module features a lesson plan for shapes. Teachers of thie lesson will engage their students in a game that requires the use of balance, movement, and "shape" mathematical concepts.
NASA
Nasa: Earth, Moon and Mars Balloons
In this lesson, students will construct a scale model of the Earth-Moon-Mars system.
ArtsNow
Arts Now Learning: Self Portraits With the Touch of a Finger [Pdf]
In this lesson, young scholars will explore self-portraiture by looking at classical portrait paintings, such as Diego Velazquez's La Infanta Margarita or Raphael's Portrait of Baldassare Castiglione. A close look at these works reveals...