CK-12 Foundation
Ck 12: Elem Math: Perimeter of Squares and Rectangles
[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on finding the perimeter of rectangles and squares.
Annenberg Foundation
Annenberg Learner: From Corner to Corner
Measure the lengths and diagonals of three squares with a ruler. Look over your measurements and try to come up with a rule of thumb for estimating the length of a diagonal if you know the length of a side.
Shodor Education Foundation
Shodor Interactivate: Lesson: An Introduction to Quadrilaterals
Quadrilaterals-parallelograms, rectangles, and trapezoids-are thoroughly introduced in this lesson plan for upper elementary and middle school students. Lots of resources are linked to it to help support the teacher and students....
National Council of Teachers of Mathematics
The Math Forum: Using Geoboards in the Classroom
A thorough look at the extensive uses of geoboards in the classroom. Links are listed which give introductory information on geoboards - for teachers new to using them. Then, lesson plans are provided for using geoboards in teaching...
Mathigon
Mathigon: Geometry: Polygons and Polyhedra: Quadrilaterals
This lesson focuses on quadrilaterals which can fall into multiple categories based on the number of sides and the angles.
CK-12 Foundation
Ck 12: Elem Math: Visually Identifying Quadrilaterals
[Free Registration/Login may be required to access all resource tools.] Cursor down if needed to locate the video "Visually Identifying Quadrilaterals (Trapezoids, Parallelograms, Rectangles, Squares, Rhombi)." Students watch a video and...
Better Lesson
Better Lesson: Partitioning Rectangles and Squares
This site provides six practice activities to learn how to partition a rectangle into rows and columns of same-size squares and count to find the total number of them.
CK-12 Foundation
Ck 12: Elem Math: Given the Area Find the Side Length and Perimeter Squares
[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on how to find the perimeter and side length of a square when given the area of a square....
Starfall
Starfall: Puzzles
In this interactive students click on one of the black statues to break them down into shapes; then they reconstruct the statue by putting the puzzle pieces together, which shows the animal that it represents and replaces the statues...
Alabama Learning Exchange
Alex: Tan Ii
The Chinese character mark for Tan II (pronounced she-tow-bah) is the second of two lessons to introduce first grade students to geometry using tangrams. This lesson incorporates history, math, and language arts. In this lesson students...
Alabama Learning Exchange
Alex: A What? A What? A Quadrilateral
In this lesson, students will identify the characteristics of a quadrilateral. Students will have a chance categorize quadrilaterals into subgroups such as squares, rhombuses, rectangles, and nonregular quadrilaterals. This lesson using...
National Council of Teachers of Mathematics
Nctm: Illuminations: Shape Tool
This tool allows you to create any geometric shape imaginable. Squares, triangles, rhombi, trapezoids and hexagons can be created, colored, enlarged, shrunk, rotated, reflected, sliced, and glued together.
Geometry Help
Geometry Help: Squares
Explains the basic concept of a square with step-by-step instructions and methods for solving specific problems on your own relating to this topic.
Better Lesson
Better Lesson: So Many Squares! Red & Blue Sort It Out
SWBAT sort squares by color into 2 sets or groups.
PBS
Pbs Learning Media: Exponents and Radicals: Targeted Math Instruction
This instructional activity focuses on exponents and radicals as they apply to problems involving squares, perfect squares, and square roots.
Quia
Ixl Learning: Rectangles
Brush up on your math skills relating to rectangles then try some practice problems to test your understanding.
Quia
Ixl Learning: Rhombuses
Brush up on your math skills relating to rhombuses then try some practice problems to test your understanding.
E-learning for Kids
E Learning for Kids: Math: Market Place: 2 D Shapes and Patterns
On this interactive site, students learn to identify squares, circles, and triangles.
Other
Nearpod: Perimeters of Polygons
In this lesson on finding the perimeter of rectangles, 3rd graders learn key vocabulary, explore grid paper, and apply their learning to a real-world situation.
Harvey Mudd College
Mudd Math Fun Facts: Difference of Squares
Using algebra, learn how to do fast math in your head!
University of California
Geometry Junkyard: Dissection Tiling
A great and very informative article about dissection tiling or tessellation.
Maths Challenge
Maths challenge.net: Square Laminas
Solve this square lamina problem using your visualization skills and other mathematical prolem solving strategies.
PBS
Pbs Teachers: Soak It Up [Pdf]
Compare three prototypes of paper towels using strategies to find the best value in terms of cost and quality. Determine the surface area of a water stain on a paper towel using a transparent grid.