Khan Academy
Khan Academy: Praxis Core Math: Circles Lesson
A basic review of circles and how to calculate the circumference, radius, diameter, and area. Includes practice questions.
CK-12 Foundation
Ck 12: Geometry: Asa and Aas Triangle Congruence
[Free Registration/Login may be required to access all resource tools.] In this lesson students prove two triangles are congruent with the Angle-Side-Angle and Angle-Angle-Side shortcuts. Students examine guided notes, review guided...
Other
School House Technologies: Free Math Worksheets for Teachers
A collection of math worksheets covering a multitude of math topics.
Better Lesson
Better Lesson: Super Squares!
This lesson provides an overview of squares, along with a chance to create actual squares and an opportunity to illustrate objects shaped like squares.
National Council of Teachers of Mathematics
Nctm: Standards for School Mathematics
This standards-based NCTM website offers resources for teachers of mathematics for all grade levels, including interactive math tools, lesson plans, online resources, and the like.
Homeschool Math
Homeschool Math: Lines, Rays, and Angles
This fourth-grade geometry lesson teaches the definitions for a line, ray, angle, acute angle, right angle, and obtuse angle. We also study how the size of the angle is ONLY determined by how much it has "opened" as compared to the whole...
PBS
Pbs: Black Kingdoms of the Nile
A geometry lesson that examines the history and structure of ancient pyramids and engages students in constructing pyramid models. A comprehensive lesson that considers students with diverse learning styles. Math concepts introduced...
CK-12 Foundation
Ck 12: Geometry: Dilation in the Coordinate Plane
[Free Registration/Login may be required to access all resource tools.] This concept explores graphing a dilation given a description of the dilation. Students examine guided notes, review guided practice, watch instructional videos and...
Better Lesson
Better Lesson: Making New Shapes With Shapes
My first graders have been studying the defining attributes of 2D shapes. They are going to love using toothpicks and marshmallows to present their knowledge of 2D and create 3D shapes.
Better Lesson
Better Lesson: Assessing Composing and Decomposing Shapes
Knowledge in Action! Today you will find out if the students are understanding the idea of decomposing and composing shapes with pattern blocks.
Better Lesson
Better Lesson: Designing a Restaurant
Understanding area and perimeter can help children work on solutions to very important, real world problems.
Better Lesson
Better Lesson: Polygons Explore the Possibilities
Online drawing programs allow students to explore many possibilities with polygons!
Better Lesson
Better Lesson: Measuring Our Classroom's Perimeter and Area!
Connect new measurement knowledge and skills to the students' immediate environment.
Better Lesson
Better Lesson: Distributive Property, Day 2
The children have been practicing decomposing areas and now digits in order to understand and use the distributive property.
Better Lesson
Better Lesson: Differences With Shapes
Differences between shapes are determined through measurement skills.
Better Lesson
Better Lesson: What Makes a Shape? Analyzing and Script Writing
Third graders will use the bat houses we built as examples of various quadrilaterals.
Alabama Learning Exchange
Alex: Determine Transformation(s)
Students will use graphing calculators(TI-83 Plus) to find transformations of polygons.This lesson plan was created as a result of the Girls Engaged in Math and Science, GEMS Project funded by the Malone Family Foundation.
Other
Ctte: Geometer's Sketch Pad Activities
This site offers numerous activities for middle school and high school students to explore using Geometer's Sketch Pad.