CK-12 Foundation
Ck 12: Geometry: Area of a Parallelogram
[Free Registration/Login may be required to access all resource tools.] This concept teaches students how to find the area of a parallelogram. Students examine guided notes, review guided practice, watch instructional videos and attempt...
CK-12 Foundation
Ck 12: Geometry: Area and Perimeter of Similar Polygons
[Free Registration/Login may be required to access all resource tools.] This concept teaches students to find area and perimeter of similar polygons using ratios. Students examine guided notes, review guided practice, watch instructional...
Alabama Learning Exchange
Alex: Abundant Area
This is an inquiry and technology-based lesson that allows young scholars to discover the relationship between perimeter and area. Students apply problem-solving strategies to solve the real-life problem posed in this lesson. This lesson...
Alabama Learning Exchange
Alex: There's Perimeter in the School!
Students will work in groups to measure the perimeter of items around the school. They will record their data on a spreadsheet in the form of a line plot.
Alabama Learning Exchange
Alex: Students Only! No Teachers Aloud
The students will be introduced to area and perimeter. The teacher will pose a real-life situation in which the students will have a chance to explore an actual section outside to determine the area and perimeter of a set location.
Alabama Learning Exchange
Alex: It's in the Bag
This lesson is a unique and fun way to review perimeter, angles, and types of adjectives. Students pick an object from the classroom that will fit in a paper lunch bag. They investigate their object and fill in the attached sheet. You...
Alabama Learning Exchange
Alex: Learning From Limbo
Using a limbo set, young scholars will participate in learning about perimeter and area of a rectangle. Students will explore how the area and perimeter changes as the limbo pole is lowered. This lesson plan was created by exemplary...
Alabama Learning Exchange
Alex: It's Around There Somewhere!
The purpose of this lesson is to review the concepts of perimeter, and circumference. Students will also use their knowledge to apply perimeter, and circumference formulas within practical applications such as in spatial design. This...
Alabama Learning Exchange
Alex: Perimeter of Polygons
The purpose of this lesson is to learn how to find the length, or perimeter of a polygon in real world tasks.
Better Lesson
Better Lesson: Filling in the Middle
Students use both area and perimeter to work with geometric shapes.
Better Lesson
Better Lesson: 3 Digit Perimeters
Second graders work with 3-digit numbers as they solidify their understanding of the difference between perimeter and area.
Better Lesson
Better Lesson: Area of a Room: Basic Practice
Creating rooms with different dimensions but the same area improves understanding of multiplicative principles.
Cool Math
Coolmath: Precalculus Basic Formulas to Know
This CoolMath resource provides an introduction to some Precalculus formulas.
Better Lesson
Better Lesson: Perimeter of My Fence
A farmer needs a fence to keep the bunny out of his lettuce patch, but does he understand perimiter enough to buy the right amount?
Better Lesson
Better Lesson: How Big Is a Mile?
How far do I have to walk in order to make 1 mile? Students measure, add, and figure it out.
National Council of Teachers of Mathematics
Nctm: Illuminations: Scale Factor
Use this applet to investigate how changes in the scale factor influence the ratio of perimeters and the ratio of areas between two figures.
Shodor Education Foundation
Shodor Interactivate: Tables and Chairs
Explore perimeter through rectangular and straight-line arrangements of tables, calculating the number of chairs needed to surround different arrangements.
Math Open Reference
Math Open Reference: Semicircle
A handy reference guide to semicircles. It provides definitions and examples that enhance further explanation. Includes links to related topics.
Better Lesson
Better Lesson: Measuring With Quarter Inches
Third graders build measuring skills using quarter inch measurements.
Better Lesson
Better Lesson: Perimeter Measuring Around
This lesson focuses on the addition measurement of perimeter using real world examples.
Better Lesson
Better Lesson: Design a Space Using Area Models Day 1 and Day 2
Third graders use area models to find the total area of a store, home, or other real world space.
Shodor Education Foundation
Shodor Interactivate: Shape Builder
This activity operates in one of two modes: auto draw and create shape mode, allowing you to explore relationships between area and perimeter.
Better Lesson
Better Lesson: Jumping Into Math, Measurement & Data Day 2
Third graders create line plots and analyze data using measurement data with quarter unit fractions.
Better Lesson
Better Lesson: Unit 7 Pretest
What do students already know about geometry? What gaps do students have in their understanding? Students take the Unit 7 pretest in order to inform instruction.