National Council of Teachers of Mathematics
Nctm: Illuminations: Scale Factor
The interactive applet allows learners to explore the relationships between side length, area, and perimeter. Students see how changes in the scale factor influence the ratio of areas and perimeters. [Requires Java.]
CK-12 Foundation
Ck 12: Elem Math: Unknown Dimensions of Squares and Rectangles (Grade 3)
[Free Registration/Login may be required to access all resource tools.] This learning module features five videos and a set of practice questions in which students learn to compute linear measures, given edge or surface measures of...
Khan Academy
Khan Academy: Find a Missing Side Length When Given Area
Practice finding a missing side length on a rectangle when given the other side length and the area. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
CK-12 Foundation
Ck 12: Elem Math: Perimeter With Side Lengths
[Free Registration/Login may be required to access all resource tools.] Students practice calculating the perimeter of various polygons.
CK-12 Foundation
Ck 12: Elem Math: Area and 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 the area and perimeter of rectanlges and squares.
CK-12 Foundation
Ck 12: Elem Math: Given the Perimeter Find the Side Length and Area Squares
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on how to find the area of a square when given the perimeter. CCSS.Math.Content.3.MD.D.8 Solve real world and mathematical problems...
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.
Oswego City School District
Regents Exam Prep Center: Area of Polygons and Circles
A lesson focusing on the area of polygons and the circumference of circles. Engaging, interactive practice worksheet, lesson plan, and related classroom activity complete this lesson.
Shodor Education Foundation
Shodor Interactivate: Perimeter Explorer
Use this applet to find the perimeter of a variety of shapes with the same or different areas.
Shodor Education Foundation
Shodor Interactivate: Lesson: Perimeter
This lesson plan helps students explore the mathematical concept of perimeter. Resources are available to support teacher and students.
Education Development Center
Tune in to Learning: Polygons and Perimeter
Explore different polygons and find their perimeter with this interactive lesson from T.V.411. Students see examples of polygons in everyday life and have immediate feedback to your responses to lesson questions.
University of Colorado
University of Colorado: Ph Et Interactive Simulations: Area Builder
Create shapes using colorful blocks, and explore the relationship between perimeter and area. CCSS.Math.Content.3.MD.C.7.a Find the area of a rectangle with whole-number side lengths by tiling it
Khan Academy
Khan Academy: Represent Rectangle Measurements
Label the given measurements in a diagram. Find the side length of a square when given the area. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Area & Perimeter of Rectangles Word Problems
Find the missing side length of a rectangle when given its perimeter or area. Compare perimeters and areas of rectangles. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive...
Khan Academy
Khan Academy: Area of Rectangles
Find area of rectangles and squares by multiplying side lengths. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Comparing Area and Perimeter
In this exercise, students practice comparing area and perimeter. Students receive immediate feedback and have the opportunity to watch a tutorial video, get hints, and try questions repeatedly.
Khan Academy
Khan Academy: Find a Missing Side Length When Given the Perimeter
In this exercise, students will learn how to find the length of one side of a polygon when the perimeter is given. Students receive immediate feedback and have the opportunity to watch a tutorial video, get hints, and try questions...
Khan Academy
Khan Academy: Find Perimeter by Counting Unit Squares
In this exercise, students practice find the perimeter of shapes by counting unit squares. Students receive immediate feedback and have the opportunity to watch a video tutorial, get hints, and try questions repeatedly.
Khan Academy
Khan Academy: Find Perimeter When Given Side Lengths
In this exercise, students practice finding perimeter when given side lengths. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly. CCSS.Math.Content.3.MD.D.8 Solve real world and...
Khan Academy
Khan Academy: Find a Missing Side Length When Given Perimeter
Find a missing side length for a figure when given the perimeter. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Find Perimeter When Given Side Lengths
Find perimeter of figures when given an image or context. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints. CCSS.Math.Content.3.MD.D.8 Solve real world and...
Illustrative Mathematics
Illustrative Mathematics: 3.md Shapes and Their Insides
The purpose of this task is to help students differentiate between a polygon and the region inside of a polygon so that they understand what is being measured when the perimeter and area are being found. Aligns with 3.MD.D.
![Arts Now Learning: Performing Perimeter [Pdf] Lesson Plan](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Arts Now Learning: Performing Perimeter [Pdf] Lesson Plan")
ArtsNow
Arts Now Learning: Performing Perimeter [Pdf]
In this lesson, 3rd graders calculate the perimeter of various geometric shapes and represent the perimeter with a movement phrase. They will identify the types of angles within each shape. Other students will identify the shape that was...
ArtsNow
Arts Now Learning: Monumental Construction [Pdf]
In this lesson, learners work in teams to create large paper sculptures using newspaper rolled up into tubes.