Lesson Plan
Curated OER

The Gum Drop

For Teachers 6th - 8th
Students find the area of three figure by the traditional formulaic methods. Then they count the number of grid squares to double check. They show an intuitive sense of Pick's Algorithm by counting every two boundary squares as one unit....
Lesson Plan
Curated OER

Investigation Designing a Patchwork Quilt

For Teachers 4th
Fourth graders practice calculating area by creating a classroom quilt. Students are given a 6x6 inch square material they design based on a classroom theme. A sample of the class quilt is created using graph paper so students may...
Worksheet
Curated OER

Finding Angles, Volume, Area, and Perimeter

For Students 4th - 6th
Elementary schoolers complete word problems dealing with the different kinds of measurements of different shapes. They solve 10 problems including perimeter, angles, volume, and more.
Lesson Plan
Texas Instruments

Areas of Regular Polygons and Circles

For Teachers 9th - 12th Standards
Learners explore area of polygons and regular polygons in this math instructional activity. They calculate the area of several polygons using Cabri Jr. and analyze shapes and write formulas to solve for the area.
Lesson Plan
Curated OER

Chords of a Circle

For Teachers 9th - 12th Standards
Teach how to differentiate between chords and perpendicular bisectors. In this geometry lesson, students relate the properties of chords and circle to solving right triangle. They define what makes two chords congruent in side a circle.
Lesson Plan
Curated OER

Equation of a Circle

For Teachers 9th - 12th Standards
High schoolers write the equation of a circle. In this geometry lesson, students check the solution of a coordinate pair by evaluating them. They graph the circle given the equation and radius.
Interactive
Curated OER

Area and Perimeter of Rectangles Worksheet (II)

For Students 10th
In this geometry worksheet, 10th graders determine area and perimeter of rectangles, given the width and the length. The one page interactive worksheet contains ten questions. Answers and hints are included. 
Assessment
Noyce Foundation

Pizza Crusts

For Teachers 6th Standards
Enough stuffed crust to go around. Pupils calculate the area and perimeter of a variety of pizza shapes, including rectangular and circular. Individuals design rectangular pizzas with a given area to maximize the amount of crust and do...
Lesson Plan
EngageNY

Arc Length and Areas of Sectors

For Teachers 9th - 10th Standards
How do you find arc lengths and areas of sectors of circles? Young mathematicians investigate the relationship between the radius, central angle, and length of intercepted arc. They then learn how to determine the area of sectors of...
Lesson Plan
Houghton Mifflin Harcourt

Developing Formulas for Circles and Regular Polygons

For Teachers 6th - 10th Standards
Formulas and procedures for finding the area and circumference are not provided on this handout, so it will be best used as a practice of already-acquired skills. It is a well-rounded assignment, however, as it includes diagrams,...
Assessment
1
1
Balanced Assessment

Dart Boards

For Students 11th - 12th Standards
Bulls eye! Design dart boards with specific chances of winning. Individuals determine the probability of hitting a circular and a triangular dart board inscribed in squares. They create dart boards that have a 50 percent chance of...
Assessment
Balanced Assessment

Paving the Patio

For Students 6th - 8th
Next time you need to repave your patio, have your scholars do all the math. They first calculate and answer questions using the area of patio blocks. Next, they determine the cheapest block to use to pave the patio.
Activity
Primary Resources

Drama Warm Ups and Circle Games

For Teachers 2nd - 12th
Circle games, energetic games, calming games, exit games. Whether used as ice breakers, warm ups, or exit strategies, or used in drama classes or content areas, the 28 games detailed in this packet deserve a spot in your curriculum...
Lesson Plan
1
1
Curated OER

Collaborative Literature Circle For the 21st Century

For Teachers 4th - 6th
Using ichat or Edmodo 4th -6th graders participate in an inter-school literature circle. Students from two different schools pair up online through ichat and use a blog to conduct a book circle. This lesson is wonderful; it fully...
Interactive
Curated OER

Circle Problems - Radius, Diameter, Circumference and Area

For Students 9th - 12th
In this online math instructional activity, students determine the radius, circumference, diameter and area of circles. This excellent resource allows the students to check their answers, and to get "hints" should they run into...
Interactive
Curated OER

Area of Circle Worksheets

For Students 10th
In this geometry worksheet, 10th graders calculate the area of circle give either the radius or the diameter. The one page interactive worksheet contains ten questions. Answers and  hints are included. 
Lesson Plan
Curated OER

Area of Triangle using the Semi-Perimeter and Radius

For Teachers 8th - 10th
Students investigate the properties of circles. For this geometry lesson, students calculate the area and perimeter of a triangle. They identify the perimeter and radius length of a circle.
Interactive
Curated OER

Word Problems that involve Circles

For Students 9th - 12th
In this online math activity, students solve word problems the involve circles. This excellent resource allows the students to check their answers, and to get "hints" should they run into difficulties. A terrific teaching tool!
Interactive
Curated OER

Area of Shaded Regions that involve Circles

For Students 9th - 12th
In this online math activity, students determine the area of shaded regions within a circle. This excellent resource allows the students to check their answers, and to get "hints" should they run into difficulties. A terrific teaching tool!
Interactive
Curated OER

My Test Book: Area and Perimeter

For Students 5th - 8th
In this online interactive math skills worksheet, learners solve 10 multiple choice math problems regarding area, perimeter, and circumference. Students may submit their answers to be scored.
Worksheet
Curated OER

Circles: Finding Circumference

For Students 9th - 12th
For this circles worksheet, students find the circumference of 20 circles.  Students find the circumference given the radius, diameter, and area of various circles.
Worksheet
Curated OER

Circumference and Area

For Students 6th
In this circumference and area worksheet, 6th graders find the circumference and area of circles when the diameter is given. Students complete 9 problems.
Worksheet
Curated OER

Circumference and Area

For Students 4th - 6th
In this circumference and area worksheet, students find each for a set of 9 circles. A website reference for additional activities is given.
Lesson Plan
Curated OER

Match The Graph Circles

For Teachers 9th - 12th Standards
High Schoolers engage in a study of circles and graphs that are related with the focus upon finding the center and radius. The lesson plan includes the suggestion of giving homework using circle problems before this one to create...

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