Shodor Education Foundation
Shodor Interactivate: Lesson: Angles
This upper elementary and middle school lesson plan introduces the concept of acute, obtuse and right angles. Also, as the instructional activity proceeds vertical, adjacent, alternate interior and alternate exterior angles are explored....
University of South Florida
Fcat: Reflection: Teacher Notes
Students use the coordinate plane to investigate how reflections affect geometric shapes. Can be used by the student, but is also a great lesson plan idea for teachers.
NumberNut
Number Nut: Colors and Shapes
A succinct overview of colors and shapes with links to two shape games. In Shape Name Memory Challenge you match the shape with its name. In Three-Dimensional Shape Quiz, you must answer the quiz question by clicking on the correct color...
Texas Instruments
Texas Instruments: Cyclic Quadrilaterals
Students construct cyclic quadrilaterals and investigate their properties. They determine which quadrilaterals from the quadrilateral hierarchy are cyclic.
Texas Instruments
Texas Instruments: The Midpoint Formula
The purpose of the activity is for students to verify the results of the Midpoint Formula using the dynamic capabilities of Cabri Jr.
Texas Instruments
Texas Instruments: Math Today Snow Is as High as an Elephant
The USA TODAY Infograph "When the snow is as high as an elephant" helps us understand snow from a more practical point of view. Students will answer several geometry questions about the different components of the graphic.
Texas Instruments
Texas Instruments: Cabri Geometry Tour
In this activity, students will practice some of the basic functions of the Cabri Geometry software, including use of the Pointer, Point, Line, Measure, and Construct toolbars.
Texas Instruments
Texas Instruments: Undefined Terms and Definitions
This is a LearningCheck quiz on undefined terms in the beginning of Geometry.
Texas Instruments
Texas Instruments: Geoboard App
Students use the Geoboard App to measure arcs, line segments, area, and perimeter, as well as rotate, reflect, and translate objects.
Texas Instruments
Texas Instruments: Bring Geometry to Life
In this activity, students use the Geometer's Sketchpad application to construct Euler's Line, Pythagorean Proof, and Fermat's point. They also investigate the concept of perimeter.
Texas Instruments
Texas Instruments: Graphing an Extra Dimension
In this activity, students learn to graph equations in 3-D space called surface. They learn to use graphs in 3-D. They will focus on the characteristics of surface types called paraboloids.
Texas Instruments
Texas Instruments: Cabri Jr. Introduction
An introduction to Cabri Jr. with step by step instructions to the basics of Cabri Jr.
Texas Instruments
Texas Instruments: Only Half There?
In this activity, students use measuring tools and calculators to make half-sized drawings of themselves.
Texas Instruments
Texas Instruments: Preparing for Proofs
This activity introduces students to the terms of hypothesis, conclusion, conditional, converse, inverse, contrapositive, and biconditional using popular advertising slogans. A learning check activity is used to check their understanding...
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.
Science Buddies
Science Buddies: Chain Reaction: Inversion and the Pappus Chain Theorem
Here is a challenging problem for anyone with an interest in geometry. This project requires background research to solve it, but it is an excellent illustration of visual thinking in mathematics.
Math Slice
Math Slice: Sundee Slice Special Test
A concise tool for assessing a variety of math concepts including measurement, algebra, number sense, and data. Assessment is scored online immediately. An excellent tool for quick assessment.
Math Slice
Math Slice: Graph Slice Special Test
A ten question test for assessing measurement concepts of area and perimeter. Assessment is scored online and student scores are compared with other students who have taken the assessment. Great assessment tool.
Math Slice
Math Slice: Geometry Slice Special Test
A succinct test for assessing geometry concepts. Assessment is scored online giving immediate feedback. An excellent assessment tool.
Math Slice
Math Slice: Solid Slice Special Test
A ten-question test for assessing geometry concepts with solid figures. This assessment is scored online providing students with immediate feedback. Great for use as an assessment tool.
University of Texas at Austin
Mathematics Teks Toolkit: Oh No! My Ominoes!
Explore pentominoes by determining congruent and non-congruent shapes.
University of Texas at Austin
Mathematics Teks Toolkit: Exploring C/d= Pie
A collection of circular objects will be used to explore circumference and diameter of circles.
Math Medics
S.o.s. Math: Inverse Hyperbolic Functions
This lesson has information explaining the Inverse Hyperbolic Functions. There is a worked example that the student can look over and one that the student can work and check the answer.
Math Is Fun
Math Is Fun: Regular 2 D Shapes
This tutorial provides illustrations for regular 2-D shapes as well as a definition for polygons and for regular polygons.