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
Circumscribing a Circle About a Triangle
Pupils circumscribe a circle about a triangle. They construct a triangle using Cabri Jr and then circumscribe it. They then use knowledge of perpendicular bisectors and circumcenters to locate the center of the circle and then...
Curated OER
Circle Circus
Third graders find the radius and diameter of a bubble. In this radius and diameter instructional activity, 3rd graders create bubbles on their desk and find the radius and diameter of the bubble. Students work in partners to define...
Curated OER
Parachutes, Circles and Pi...Oh My!
Students explore different size circles to discover the relationship between diameter and circumference. In this circles and Pi lesson, students construct simple parachutes using circle patterns of varying sizes. Students predict the...
Mathematics Assessment Project
Sorting Equations of Circles 2
How much can you tell about a circle from its equation? This detailed lesson plan focuses on connecting equations and graphs of circles. Learners use equations to identify x- and y-intercepts, centers, and radii of circles. They also...
Curated OER
Right Triangles and The Unit Circle
Learners solve right triangles using trigonometry. In this geometry lesson plan, students use the unit circle to identify different trig values. They identify the six trigonometric identities.
Curated OER
Unit Circle Triangle
Learners find the different ratios of a right triangle. In this geometry lesson, students apply the concept of the Pythagorean theorem as they identify the different angles and parts of a Unit Circle. They find the ratios of sine,...
CK-12 Foundation
Tangent Graphs: Slope and Angle
Learning about tangents doesn't have to be a slippery slope. Pupils drag a point around a unit circle to see how angle affects the slope of a line. They individually answer a set of challenge questions to come to the conclusion that...
EngageNY
Graphing the Tangent Function
Help learners discover the unique characteristics of the tangent function. Working in teams, pupils create tables of values for different intervals of the tangent function. Through teamwork, they discover the periodicity, frequency, and...
Illustrative Mathematics
Coins in a Circular Pattern
What starts as a basic question of division and remainders quickly turns abstract in this question of related ratios and radii. The class works to surround a central coin with coins of the same and different values, then develops a...
Curated OER
Our “Civilized” Society
The Scarlet Letter is the anchor text in a four-week unit that examines Hawthorne's novel through the lens of the intolerances found in a supposed civilized society. In addition to their reading, class members watch clips from TV shows,...
CK-12 Foundation
Coterminal Angles: Full Circle
Take a terminal side for a spin. Pupils use an interactive to investigate angles of rotation that share the same terminal side. Scholars create coterminal angles and calculate what other angle sizes share the same final position.
EngageNY
Construct a Nine-Point Circle
There are an infinite number of points on a circle; can you find nine of them? After putting together a nine-point circle, pupils use constructions and their knowledge of triangle segments to determine the center of the circle. Learners...
Virginia Department of Education
Exploring 3-D Geometry
Take young mathematicians on an exploration of the world of 3-D geometry with this seven-lesson unit. After first defining the terms perimeter, area, and volume and how they apply to the real world, students continue on to learn the...
Curated OER
Angles in Standard Positions
Young scholars identify positive and negative angles using the Unit Circle. In this pre-calculus lesson, students identify the different angles on a unit circle using the coordinate plane and the four different quadrants as a guide. They...
Curated OER
Comparing Areas
Before your scholars know how to multiply side lengths to find an area, give them some practice in simply counting units. They examine shapes that have already been segmented into units, counting them to get the area. There are three...
Curated OER
Typical Numeric Questions for Physics I - Motion
Seven pages with 33 multiple choice questions about motion make up this activity. Calculations must be performed in order to choose the correct answer. Physics majors will solve for angles, displacement, acceleration, speed, and time for...
National Security Agency
Partying with Proportions and Percents
Examine ratios and proportions in several real-world scenarios. Children will calculate unit rates, work with proportions and percentages as they plan a party, purchase produce, and take a tally. This lesson plan recommends five...
Curated OER
Our Solar System - Comparing Planetary Travel Distances
NASA presents a mini-unit on distances in our solar system. It incorporates scientific concepts of gravity, mass, density, and payload while your aspiring astronauts also employ mathematics skills. They calculate speed, they determine...
EngageNY
End of Unit Assessment, Part 1: Revising Claims and Evidence based on Feedback
What to do with all that feedback? Scholars use colored writing instruments to circle any feedback that relates to the first two rows of the grading rubric. After working on revisions for their papers, learners view the performance task...
EngageNY
Mid-Unit Assessment Part 1: Writer’s Roundtable
Hear ye, hear ye, it's time for a writer's roundtable! Scholars clarify their thinking about their narrative writing project by engaging in a fishbowl discussion about their plans. As members within the inner circle discuss the topic,...
EngageNY
End of Unit 2 Assessment, Parts 1A and 1B: Fishbowl on Screen Time and Adolescents
Here's a surefire way to ensure that class discussions go swimmingly! Using the resource, scholars participate in a Fishbowl activity, forming two concentric circles in the classroom. As the group on the inside of the fishbowl discusses...
EngageNY
End of Unit 2 Assessment, Part 1A: Fishbowl on Better Use of Water in Agriculture
Just keep swimming! Pupils participate in a Fishbowl discussion, sitting in two concentric circles and alternating between speaking and listening roles. During the discussion, they defend a claim about the best way to begin managing...
EngageNY
End of Unit Assessment, Part 1, Continued: Revising Vocabulary and Conventions based on Feedback
Howdy, partner! Scholars partner up to look at the last two rows in the writing rubric. After discussing the details in the rubric about organization and conventions, learners use colored writing tools to circle feedback in their...
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