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Lesson Plan
Curated OER

Acoustical Ceiling

For Teachers 4th - 7th
Young scholars investigate acoustical ceilings.  For this acoustical ceilings lesson, students construct a blueprint for an acoustical ceiling.  Young scholars use area and perimeter of rectangles to construct their blueprint.  Students...
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Lesson Plan
Curated OER

Similarity

For Teachers 9th - 10th
Students find the factor of proportionality in similar polygons. In this similarity of polygons lesson plan, students measure the sides and angles of polygons and derive a factor of proportionality between corresponding pairs of sides...
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Lesson Plan
Pennsylvania Department of Education

A Geometric Scavenger Hunt

For Teachers 5th
Fifth graders connect their knowledge of polygons and polyhedrons. For this geometric shapes lesson, 5th graders identify and classify two- and three-dimensional objects. Students construct a polyhedron out of polygons and describe their...
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Lesson Plan
Curated OER

Up For Change?

For Teachers 7th - 9th
Students explore similar objects. They participate in a series of hands-on, multimedia and online activities to examine how the edge length affects the angle measures, perimeters and areas of similar regular polygons. Students find the...
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Lesson Plan
Curated OER

Grade 3: What Can I Make with 30 Centimeters?

For Teachers 3rd
Third graders create polygons with perimeters of 30 centimeters, use the centimeter grid paper to determine the area of each shape, and organize the shapes to make generalizations from the patterns they see.
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Worksheet
Curated OER

Geometric Word Problems

For Students 10th
In this geometric figures worksheet, 10th graders solve and complete 11 different word problems. First, they find the area of a regular octagon with a given side. Then, students find the area of each shaded region. They also find the...
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Lesson Plan
Curated OER

Pyramid in The Desert

For Teachers 9th - 11th
Students investigate the Sierpinski triangle and calculate the ratio and area of the triangle. In this fractals lesson, students calculate parts of a Sierpincki triangle. They use Google Earth to help them construct the different parts...
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Lesson Plan
Curated OER

Tessellmaniacs

For Teachers 7th
Seventh graders create 3 original tessellation using polygons. They slide, turn, rotate and glide their designs on the computer. They print their tessellation on a T-shirt and teach the 6th graders about tessellations.
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Lesson Plan
Curated OER

Around We Go!

For Teachers 7th - 8th
Students make accurate measurements and calculations of measuring the area an perimeter of a section of the floor accordingly. They use appropriate measurement and calculation strategies to write a complete a clear explanation for how...
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Worksheet
National Council of Teachers of Mathematics

Improving Archimedes' Method

For Students 9th - 12th
For this Archmides' method instructional activity, learners determine the area of a regular n-gon inscribed in a circle.  They use sine and cosine functions to solve problems.  This three-page instructional activity contains 4 multi-step...
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Lesson Plan
Curated OER

Flip's Flag

For Teachers 5th
Fifth graders apply the symmetry and angle properties of polygons and use fractions to express the relationships between the areas of rectangles, squares, and triangles. They analyze various country flags and develop mathematical...
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Lesson Plan
Curated OER

Napolean Triangle

For Teachers 9th - 11th
Students investigate the Napoleon triangle theory. In this polygon lesson, students  differentiate between the boundary points, interior and lattice point of a polygon. They apply concepts of equilateral triangles to solve problems.
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Worksheet
Curated OER

Measurement

For Students 7th
In this measurement worksheet, 7th graders solve 14 various types of problems that include completing a table with the base, height, and/or area of triangles and solving a number of word problems with measurement. They also estimate the...
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Lesson Plan
Curated OER

Lesson 9-3 Practice B: Composite Figures

For Teachers 9th - 12th
In this composite figures worksheet, young scholars solve 11 short answer problems. Students find the area of figures composed of various polygons. Young scholars find the area of each figure given a sketch of the figure with various...
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Lesson Plan
Curated OER

Who Let the Dogs Out?

For Teachers 7th - 8th
Students examine the concepts of area and perimeter and how they relate to a rectangle. They find the largest possible area that can be enclosed by a fixed perimeter and complete a worksheet as well as create a table of all the possible...
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Lesson Plan
Curated OER

Geometry, Measurement & Reasoning

For Teachers 7th - 9th
Students measure prisms and determine their volume. In this measurement and reasoning activity, students estimate the volume and area of prisms. They measure given boxes. Students use paper to create prisms and cylinders. They determine...
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Worksheet
Curated OER

Using Math To Build A Swimming Pool

For Students 6th - 8th
For this math worksheet, students create the plans for building a swimming pool through calculating its surface area. Then they answer the 13 related questions.
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Worksheet
Curated OER

Algebraic Manipulation

For Students 9th - 11th
In this algebraic manipulation worksheet, students examine a given number grid, find the pattern and determine an equation to fit the situation. They calculate the area of given rectangles. Students solve real life problems using given...
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Lesson Plan
Curated OER

Polygonal Strings

For Teachers 6th
Sixth graders apply knowledge of how to calculate the area and perimeter of triangles. They determine why it is inappropriate to measure the area of land by its perimeter which is done in certain areas of New Guinea. They complete a...
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Unit Plan
Mathematics Vision Project

Circles: A Geometric Perspective

For Teachers 10th - 12th Standards
Circles are the foundation of many geometric concepts and extensions - a point that is thoroughly driven home in this extensive unit. Fundamental properties of circles are investigated (including sector area, angle measure, and...
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Lesson Plan
Curated OER

Area of Parallelograms and Triangles

For Teachers 8th - 10th
Students explain the formula for finding the area of a paralellogram and its relation to the area of a rectangle. Finally, they construct the formula for the area of a paralellogram.
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Lesson Plan
Curated OER

Why Do We Add The Bases To Find The Area of A Trapezoid?

For Teachers 6th - 8th
Young scholars are given patterns of trapezoids and are to calculate the area of one trapezoid by using both patterns. They should form a parallelogram and calculate the area. They practice this technique until there is understanding.
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Worksheet
Curated OER

Algebra: Area of a Parallelogram

For Students 5th - 6th
In this parallelogram learning exercise, learners find the area and perimeters and complete a chart to show the length, width and perimeter for different rectangles with a given area. Houghton Mifflin text is referenced.
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Lesson Plan
Mathematics Assessment Project

Applying Angle Theorems

For Teachers 7th Standards
Polygon ... an empty bird cage? After finding the angles of a polygon, young mathematicians use the provided methods to solve the problem in multiple ways.

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