Lesson Plan
Space Awareness

#### Measure the Solar Diameter

For Teachers 7th - Higher Ed Standards
Scientists could measure the diameter of the sun before they knew its distance. Scholars construct a simple mirror box to measure the diameter for themselves. They compare this measurement with the official size, listed in a textbook,...
Activity
Las Cumbres Observatory

#### Measure the Diameter of the Sun

For Teachers 6th - 12th
Measuring the diameter of the sun may get a little heated, but using an indirect approach can help individuals keep their cool. Learners use the reflection of the sun to measure how long it takes for it to move one diameter. Using the...
Lesson Plan
EngageNY

#### Circles, Chords, Diameters, and Their Relationships

For Teachers 9th - 10th Standards
A diameter is the longest chord possible, but that's not the only relationship between chords and diameters! Young geometry pupils construct perpendicular bisectors of chords to develop a conjecture about the relationships between chords...
Organizer
Curated OER

#### Calculate the Diameter

For Students 6th
In this diameter worksheet, 6th graders find the diameter of 5 circles. Students are given the formula for circumference and circumference information along with a blank box to complete their work.
Lesson Plan
Curated OER

#### Discovering Pi/Welcome to Pi Day

For Teachers 9th - 12th
Students explore pi. In this circle measurement lesson, students define and identify radius, diameter, circumference, and perimeter. Students work in groups to measure several plastic lids and record their findings. Students compare the...
Lesson Plan
Illuminations

#### Circumference and Areas of Circles

For Teachers 7th - 12th Standards
Middle and high schoolers listen to a scenario about a puppy and use the scenario to develop formulas in order to find the area of a circle. In this circumference lesson, pupils understand how to find the radius, diameter, area of a...
Lesson Plan
Curated OER

#### Circles-Diameter, Circumference, Radius and the Discovery of Pi

For Teachers 7th
Seventh graders measure the diameter, circumference and radius of a circle and find pi using the diameter and circumference. In this geometry lesson plan, 7th graders work in groups to find the diameter, radius, and circumference of...
Lesson Plan
Curated OER

#### Three for the Money: The Degree/Diameter Problem

For Teachers 9th - 12th
Students explore the degree, diameter, planarity, and size of graphs.  In this degree, diameter, planarity, and size of graphs lesson plan, students try to construct a graph with more than 12 vertices that satisfy all other...
Lesson Plan
Curated OER

#### Measuring the Diameter of the Sun

For Teachers 9th
Ninth graders study the sun and its distance from Earth.  In this Sun's diameter lesson students examine how measurement data permits accurate measurement of the sun's diameter.
Lesson Plan
Curated OER

#### Looking at Circumference

For Teachers 6th - 8th
Students understand where the number for pi comes from. They understand and use the formula for circumference. Students measure the circles given out and the diameters of those circles and record the results on their worksheet.
Lesson Plan
National Research Center for Career and Technical Education

#### Transportation, Distribution, and Logistics: Tire and Wheel Assemblies

For Teachers 6th - 12th Standards
Is bigger really better? By the end of this instructional activity, learners will be able to apply formulas for computing the diameter of tires and wheel assemblies. Begin by showing a slide presentation that will review definitions for...
Lesson Plan
Curated OER

#### Bubble Mania

For Teachers K - 5th
Elementary schoolers practice measuring a soap bubble print. They follow a recipe to make a soap bubble solution. Pupils use the soapy solution to blow large bubbles with a plastic drinking straw until they pop leaving behind a circular...
Lesson Plan
Curated OER

#### Around the Clock

For Teachers 6th - 8th
Young scholars discover the relationship between the circumference of a circle and its diameter. They find the length of an arc of a circle.Students use estimation strategies in real-world applications to predict results (i.e.,...
Worksheet
Curated OER

#### Circles and Cylinders

For Students 10th
In this geometry lesson, 10th graders break down a circle and identify the different parts. They discuss chords, diameter, radius, circumference, major and minor segment. There are 42 problems broken down into 5 different sections.
Worksheet
Curated OER

#### Angular Diameter of the Sun

For Students 8th - 11th
Starting with a paragraph of information presenting the different ways we can observe planetary objects, pupils work through these instructions to see how they can observe and measure angles.  Your class will discover how these angles...
Lesson Plan
Curated OER

#### Pumpkin Predictions

For Teachers 4th - 7th
It's time for Halloween and math! Perfect for Fall, this simple worksheet provides a grid for young mathematicians to record their predictions about a pumpkin's height, stem length, diameter, circumference, and weight. After learners...
Worksheet
Curated OER

#### Equivalent Expressions A.10

For Students 9th
In this equivalent expressions worksheet, 9th graders solve and complete 9 different multiple choice problems. First, they determine the expression that is equivalent to the given equation. Then, students write the diameter of a number...
Worksheet
Curated OER

#### Changing Perspectives on the Sun's Diameter

For Students 8th - 10th
In this sun's diameter worksheet, students use a photograph taken by the SOHO satellite of the sun showing a change in diameter from one month to another. Students find the average diameter of the sun, they determine the percent change...
Lesson Plan
Curated OER

For Teachers 5th - 8th
Students explore circumferences, diameters, and radii. In this math lesson plan, students measure circumferences in inches and compute radii and diameters, given different circumferences.
Worksheet
Curated OER

#### Find the Diameter of a Circle

For Students 11th
In this online worksheet, 11th graders solve 1 challenge problem, where they must determine the diameter of a circle given different variables. The problem is printable and a solution is available.
Lesson Plan
1
1

#### The Moons of Jupiter

For Students 6th - 8th Standards
Middle schoolers analyze given data on density and diameter of objects in space by graphing the data and then discussing their findings. This ninth installment of a 22-part series emphasizes the Galilean moons as compared to other objects.
Activity
101 Questions

#### Neptune

For Teachers 6th - 10th Standards
Examine an innovative approach to a large-scale model. Pupils across the state of Maine teamed up to create a model of the solar system that spans 40 miles. Put thinking skills to work within your classes as they make the calculations to...
Interactive
Curated OER

#### Circle Problems - Radius, Diameter, Circumference and Area

For Students 9th - 12th
In this online math worksheet, 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 difficulties. A...
Lesson Plan
Curated OER

For Teachers 6th
Sixth graders will determine the circumference, diameter, and radius of a circle. In this circle lesson plan, 6th graders will measure the appropriate amount to find these measurements on circles.