Curated OER
Perpendicular Segments in a Circle
High schoolers explore the concept of circles as they construct a circle using a program such as Cabri Jr. Learners construct a chord and a diameter that are perpendicular, then measure the bisected chord and notice that both sides of...
Curated OER
Volume and Surface Area of Right Rectangular Prisms
Learners identify the formulas for three-dimensional figures. They use manipulatives to model problems. Students create foldables and explain volume and surface area. Learners complete worksheets and classify solids. Students sing a...
Curated OER
Construction Circles
Pupils investigate the number of points needed to determine a unique circle in a plane. Using Cabri Jr., they apply construction techniques to generate a circle that passes through a given number of points.
Curated OER
Equations of Circles
Using Cabri Jr. high schoolers construct a circle and determine the equation of the circle they drew by finding the center and the radius. Students use the distance formula to derive the equation of their circle.
Curated OER
Algebra II - Lesson 10-3: Circles
In this equations of circles instructional activity, high schoolers solve 4 short answer problems. Students find an equation of a circle given the center and radius.
Curated OER
The Surface Area of a Cylinder
Students measure the circumference of a cylinder. In this cylinder lesson plan, students use round container lids and flexible rectangles to measure the circumference of the cylinder. They put the shapes together to make their own...
EngageNY
Arc Length and Areas of Sectors
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...
Curated OER
Physical Education Unit Plan: Soccer - Lesson 5
Here is part five of 10 soccer lessons, this one focusing on passing and receiving. Open this session with a video of professional soccer players executing a beautiful give-and-go passing situation which leads to a score! It doesn’t get...
Curated OER
Physical Education Unit Plan: Soccer - Lesson 7
Attack and defend are the focus for this instructional activity, seventh in a series of 10. It basically pulls some of the skills together that have already been taught and allows the players to practice their specific skills in a...
University of California
Energy and Biomass Pyramids
Young scientists play tag as they act out the food pyramid in the ocean ecosystem. Energy circles pass from the smaller prey to the predators and at the end of the activity, a data chart and analysis questions allow pupils to apply their...
Curated OER
Area and Circumference of Circles
Eighth graders find the area and circumference of circles. For this area and circumference of circles lesson plan, 8th graders follow a step by step lesson and then demonstrate the skills on their own with circles they are given.
Curated OER
Splitting the Penstock
Students investigate the best way to calculate the measurements of an area. In this geometry instructional activity, students relate a large circle to a cylinder and its measurements. They use PVC pipes to gain hands on experience as...
Curated OER
Volume of Solids: Algebra/Geometry Institute
Use this volume of solids lesson plan to have learners find the surface area and volume of cylinders, pyramids, and prisms. They place cubes inside three-dimensional figures to determine the volume. Worksheets and answers are provided.
Curated OER
Bubble Mania
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...
Curated OER
The Gum Drop
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....
Curated OER
Pushing Pivots
Students calculate the area and diameter length of a circle. In this geometry lesson, students investigate the use of pivots as they review parts of a circle. They create a circle using cardboard and label all the parts.
Curated OER
Geometry: Area Project
Sixth graders identify and use area formulas for finding the area of geometric shapes.
Houghton Mifflin Harcourt
Developing Formulas for Circles and Regular Polygons
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,...
Curated OER
Collaborative Literature Circle For the 21st Century
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 plan is wonderful; it fully...
Healthy Native Youth
Chapter 5: Learning About HIV/AIDS/STI's and Hepatitis Transmission
Middle schoolers delve deep into facts about HIV, AIDS, Hepatitis, and other STI's by way of discussion and a hands-on activity. Scholars ask and discuss questions anonymously using a Question Box. Two experiments showcase the...
Teach Engineering
The Energy Problem
Think you can solve the energy problem? You'll first need to know about current energy use. Analyzing a set of circle graphs lets scholars see where energy consumption is the greatest, both by sector and by household use. They develop a...
CK-12 Foundation
Linear Equations: Deep Dish Pizza
Explore the volume of solids with a real-life connection. Learners calculate the volume of a deep-dish slice of pizza to determine its price. They model the slice as a part of a cylinder and create a formula for calculating the cost.
Curated OER
Pizza Possibilities
Middle schoolers create and interpret line plots, bar graphs, and circle graphs. The lesson assumes mastery of conversions from fraction to decimal to percent, construction of angles, and at least an introduction to graphs displaying data.
Curated OER
Patterns, Patterns, Patterns
Create geometric art in your classroom. Learners use a ruler to mark lines on their paper, they then trace a lid to create a series of circles. They color in each circle using two tones or colors to create an interesting visual pattern.