Curated OER
Let the Matrix Do It
Students create a matrix of the vertices of a triangle and produce new matrices that dilate, translate, rotate, and reflect the original triangle. After multiplying each matrix by a new scale factor, they graph the new matrix and...
Curated OER
Kindness Compliments
Young scholars write compliments for the staff at their school. For this compliments lesson plan, students demonstrate kindness by anonymously writing and taping compliments to people's doors around the school.
Curated OER
Mirror Tool
Students define properties of polygons. In this geometry lesson, students differentiate between similar and congruent polygons. They identify and use the properties of solids to solve problems.
Curated OER
Terrific Tessellations
Students explore tessellations that are found in nature and everyday objects. They observe the works of M.C. Escher. Students create their own tessellations using pencil and paper.
Curated OER
Friendship Quilt
Third graders name different kinds of shapes and then discuss what they know about them an what they would like to learn using a K-W-L chart whole group. They listen to the book, THE GREEDY TRIANGLE and then retell it to the class. They...
Curated OER
Pattern Using Unit Cells
Students explore the pattern of the unit cell. In this science lesson, students color the unit cells on a worksheet and create a pattern using unit cells.
Curated OER
Building Paper Bridges
Students construct a bridge that can hold 100 pennies. In this math lesson, students evaluate the strength of their bridges. They predict how much weight a bridge can hold based on its design.
Curated OER
Similar or Not?
Fifth graders define the meaning of similar and congruent using concrete objects. They make similar and congruent figures using geoboards. They draw their figures on dot paper, and color their designs.
Illustrative Mathematics
Illustrative Mathematics: 4.g Finding Lines of Symmetry
The purpose of this task is for students to identify figures that have line symmetry and draw appropriate lines of symmetry. Aligns with 4.G.A.3.
Illustrative Mathematics
Illustrative Mathematics: 4.g Lines of Symmetry for Circles
Mr. Watkins asked his students to draw a line of symmetry for a circle with center $O$ pictured below: Aligns with 4.G.A.3.
Illustrative Mathematics
Illustrative Mathematics: 4.g Lines of Symmetry for Triangles
The division of triangles into scalene, isosceles, and equilateral can be thought of in terms of lines of symmetry. Aligns with 4.G.A.3.
Illustrative Mathematics
Illustrative Mathematics: G Co.6 Symmetries of a Circle
Suppose C is a circle with center O. Find all lines of symmetry of the circle and explain why the list is complete. Aligns with G-CO.A.
Illustrative Mathematics
Illustrative Mathematics: G Co Why Does Asa Work?
In triangles ABC and ABD, we are given that angle BAC is congruent to angle BAD and angle ABC is congruent to angle ABD. Show that the reflection of the plane about line AB maps triangle ABD to triangle ABC. Aligns with G-CO.B.8.
Other
Earth Measure: Native American Geometry Designs: Mathematical Landscaping
If you want to plant a class garden, this is a great resource for combining geometry, Native American studies, and rocks.
University of Texas
Inside Mathematics: Fair Play [Pdf]
This task challenges a student to demonstrate understanding of the concept of measurement.
Other
Finite Geometry Notes: Diamond 16 Symmetry Puzzle
At this site see if you can solve the "Diamond 16" puzzle. Change the patterns to create ordinary or color exchange symmetry. This is just one of several challenging puzzles at this site. Links to similar puzzles and games.
Illustrative Mathematics
Illustrative Mathematics: 4.g Lines of Symmetry for Quadrilaterals
This task provides learners a chance to experiment with reflections of the plane and their impact on specific types of quadrilaterals. Aligns with 4.G.A.3.
CK-12 Foundation
Ck 12: Math Grade 3
Browse resources related to third-grade math standards. Click on a topic for interactive lessons, videos, and extra practice.
Other
Georgia Perimeter College: Parabolas
This resource provides an examination of parabolas, both vertical and horizontal, and parabolic functions. It includes six examples and a chart showing how changes in the equation coincide with changes in the graph.