Website
Science U

Science U: Welcome to the Geometry Center!

For Students 3rd - 8th
Site provides information and activities on various aspects of geometry, from shapes to patters and symmetry. Make your own tetra puzzle or build an icosahedron in the classroom. Interactive and fun.
Interactive
ABCya

Ab Cya: Shapes: Geometry Game

For Students Pre-K - 1st Standards
Shapes is a fun educational activity to help children learn basic properties of simple geometric figures. Children will practice looking for differences and similarities between shapes to complete puzzles. Shapes! gets progressively more...
Interactive
ABCya

Ab Cya: Shape Construction

For Students Pre-K - 1st Standards
Drag shapes in this geometry and symmetry practice activity.
Activity
University of Cambridge

University of Cambridge: Maths and Sports: National Flags

For Students K - 1st
During the Olympic and Paralympic Games many national flags will be on display. This activity explores 2D shapes, angles and symmetries in the context of flag designs, and is designed to be accessible to primary pupils at Key Stage 2.
Activity
National Council of Teachers of Mathematics

The Math Forum: Line Symmetry

For Teachers 3rd - 5th Standards
This site from The Math Forum is a great site if you are looking for activities to engage your students in learning about line symmetry. Peruse this collection of activities for one or two or four that would be right for your students....
Unit Plan
Khan Academy

Khan Academy: Symmetry of 2 D Shapes

For Students 9th - 10th
Analyze various shapes according to their reflective and rotational symmetries. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Identify and Count the Lines of Symmetry in Various Shapes

For Students 3rd - 5th Standards
[Free Registration/Login may be required to access all resource tools.] Students watch a video and take an assessment on identifying and counting lines of symmetry in various shapes.
eBook
Mathigon

Mathigon: Geometry: Symmetry Groups

For Students 9th - 10th
This lesson focuses on symmetry groups; some shapes have more than one symmetry. You can add two symmetries to form a new one. It provides examples and practice exercises including a "symmetry calculator."
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Reflection Symmetry

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] This concept teaches students how to determine whether or not a shape has reflection symmetry and how to draw lines of symmetry.
Handout
CK-12 Foundation

Ck 12: Geometry: Symmetry and Tessellations Study Guide

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Provides a brief overview of the different types of symmetry and of how to tessellate a shape.
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Determining Whether Given Shapes Are Rotationally Symmetrical

For Students 3rd - 5th Standards
[Free Registration/Login may be required to access all resource tools.] Students watch a video to determine if given shapes have rotational symmetry and then take an assessment to test their skills.
Interactive
Other

The Math Learning Center: Pattern Shapes

For Students 4th - 8th Standards
Students use pattern shapes to explore geometry and fractions, creating their own designs, or filling in outlines. As they work with the shapes students explore geometric relationships, think about angles, investigate symmetry, and...
Lesson Plan
Oswego City School District

Regents Exam Prep Center: Intuitive Symmetry: Point, Line, Plane, Rotational

For Teachers 3rd - 8th Standards
Investigate the concept of symmetry at this test prep site. See detailed definitions and picture examples, answer the questions in the interactive practice pages, and do the classroom activity where students use a digital camera to...
Lesson Plan
National Council of Teachers of Mathematics

The Math Forum: Building Shapes

For Teachers 3rd - 5th Standards
Based on building a hexagon, this activity from the Math Forum collection focuses on using different combinations of pattern blocks to create a hexagon. An online activity, pencil and paper method, literature connections, and a...
Website
US Department of Education

Helping Your Child Learn Math: Math in the Home

For Students Pre-K - 1st
An excellent compilation of activities that engage parents and children in math explorations at home. Detailed lessons covering a wide range of math topics such as fractions, measurements, money, data collection, and math in newspapers....
Activity
Annenberg Foundation

Annenberg Learner: Quilts

For Students Pre-K - 1st Standards
Copy a quilt block made of 16 squares. Each block will have one of the four symmetry types: H, M, B, or S and you choose which you think it is.
Lesson Plan
Science Buddies

Science Buddies: Tiling With Spidrons

For Teachers 9th - 10th
If art and math are both passions of yours, this project is meant for you! Spidrons are geometric forms made from alternating sequences of equilateral and isosceles (30 degrees, 30 degrees, 120 degrees) triangles. Spidrons were...
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Co Seven Circles Ii

For Teachers 9th - 10th Standards
In this task, seven pennies are placed in a circle so that they are all touching one in the center and their neighbors. Learners are asked to find as many rigid motions of the plane as they can which are symmetries of this configuration...
Unit Plan
Khan Academy

Khan Academy: Identify Symmetrical Figures

For Students 3rd - 5th Standards
Practice identifying symmetrical shapes. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.