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Lesson Plan
Illustrative Mathematics

Seven Circles III

For Teachers 9th - 11th Standards
A basic set-up leads to a surprisingly complex analysis in this variation on the question of surrounding a central circle with a ring of touching circles. Useful for putting trigonometric functions in a physical context, as well as...
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Lesson Plan
EngageNY

Unknown Angle Problems with Inscribed Angles in Circles

For Teachers 9th - 10th Standards
We know theorems about circles—now what? Class members prove a theorem, with half the class taking the case where a point is inside the circle and half the class taking the case where a point is outside the circle. The lesson then...
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Lesson Plan
EngageNY

Similar Triangles in Circle-Secant (or Circle-Secant-Tangent) Diagrams

For Teachers 9th - 12th Standards
First angle measures, now segment lengths. High schoolers first measure segments formed by secants that intersect interior to a circle, secants that intersect exterior to a circle, and a secant and a tangent that intersect exterior to a...
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Lesson Plan
EngageNY

Secant Lines; Secant Lines That Meet Inside a Circle

For Teachers 9th - 12th Standards
Young mathematicians identify different cases of intersecting secant lines. They then investigate the case where secant lines meet inside a circle.
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Lesson Plan
Willow Tree

Circle Graphs

For Students 9th - 12th Standards
Pie isn't just for eating! Scholars learn to create pie charts and circle graphs to represent data. Given raw data, learners determine the percent of the whole for each category and then figure out the degree of the circle that percent...
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Lesson Plan
Curated OER

Initial Fraction Ideas Lesson 12: Overview

For Teachers 3rd - 6th
Learners name and draw fractions by using their fractions circles. In this rational numbers and fraction lesson plan, students name mixed numbers and improper fractions using their fraction circles.
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Lesson Plan
Rational Number Project

Initial Fraction Ideas Lesson 22: Overview

For Teachers 3rd - 6th Standards
Have young mathematicians subtracting fractions in no time with this manipulative-based math lesson. Using their sets of fraction circles, students explore a number of word problems involving the subtraction of fractions before working...
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Lesson Plan
Curated OER

Initial Fraction Ideas Lesson 13: Overview

For Teachers 3rd - 5th
Here is a good fractions lesson which invites learners to fold paper strips to represent an equivalent fraction to the fraction model using chips or tiles displayed on the overhead. They arrange chips to represent a given fraction.
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Assessment
Inside Mathematics

Circles in Triangles

For Teachers 9th - 12th Standards
Challenge the class with inscribed circles in triangles. The assessment task requests class members use their knowledge of circles and right triangles to prove two triangles are congruent. They go on to utilize their knowledge of...
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Worksheet
Curated OER

Halves And Fourths #2

For Students 2nd - 4th
Early learners look at the pictures given and color one part to identify if it is 1/2 or 1/4. They then circle the correct fraction that they created.
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Worksheet
Math Worksheets Land

Comparing Fraction and Equivalence

For Students 3rd - 5th Standards
Which ones are equivalent? Scholars examine four fraction models to determine which ones represent the same fraction. This is a great way to help kids with numerators and denominators, as they can physically count the total number of...
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Lesson Plan
Curated OER

Inner Circle/Outer Circle Debate Strategy

For Teachers 3rd - Higher Ed
Arranged in facing concentric circles, half the class discusses an issue. The other half of the class takes notes which are then used to fuel a class discussion and to prepare editorial opinions on the topic at hand. So much emphasis is...
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Lesson Plan
Curated OER

Initial Fraction Ideas Lesson 16: Overview

For Teachers 3rd
Kids will compare creating fractions from pieces of paper to chips. They begin with a fractional part and work back to a whole. Then order fractions from smallest to largest. They also complete a worksheet to find the missing pieces to...
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Lesson Plan
Curated OER

"Pizza"rama With Fractions!!

For Teachers 3rd
Young mathematicians explore number values by utilizing food as a visual aide. They discuss the differences between halves, fourths, and eighths and how they are visually represented by a pizza. Then create their own pizza in class and...
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Printables
Curated OER

Math Manipulative and Math Teacher Tool Labels

For Teachers Pre-K - 6th
Bring some organization to your class's supply of math manipulatives with this collection of printable labels. From rulers and base-ten blocks, to stopwatches and fraction circles, labels are included for dozens of different objects,...
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Worksheet
Curated OER

Fraction Circles (Ninths to Twelfths Unlabelled)

For Students 1st - 2nd
In this fraction circles worksheet, students use the unlabelled circles for showing ninths, tenths, elevenths or twelfths. There are no directions.
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Assessment
Balanced Assessment

Triangle in Circle

For Students 6th - 8th
Even kindergartners can draw triangles in circles, but the assessment task requires a bit more geometric knowledge. Scholars investigate triangles that have a diameter of a circle as one of its sides. They must consider triangles that...
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Lesson Plan
EngageNY

Construct a Square and a Nine-Point Circle

For Students 9th - 10th Standards
Anyone can draw a square, but can you CONSTRUCT a square? Here is a resource that challenges math scholars to create steps to finish their own construction. They test their ability to read and follow directions to complete a construction...
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Lesson Plan
Dick Blick Art Materials

Start with a Circle...

For Students K - 12th
The Golden Ratio. The Divine Proportion. Yup. It's math and art blended into one colorful activity. Young artists combine colored tissue paper circles and parts of circles to create geometric patterns. As a bonus, kids get to figure out...
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Lesson Plan
Curated OER

Initial Fraction Ideas Lesson 6: Overview

For Teachers 3rd - 5th
Students use fraction circles to observe fractions in smaller parts and to complete charting and word problem activities. In this fraction lesson plan, students complete chart problems, word problems, and fraction comparing problems...
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Interactive
Arcademics

Pizza Pandas

For Students 3rd - 5th Standards
Grab a fraction of the pizza pie. Players match the written fraction to the amount of pizza shown on the platter. The game allows for up to four individuals at the same time. Scholars reach for a napkin with the fraction that matches the...
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Assessment
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Balanced Assessment

Star from Square

For Students 9th - 12th Standards
Quilting is not only beautiful and unique—it is a mathematical art. Show your classes how to design a quilting block while practicing area and circumference of circles. Scholars create a star from a square and then find the circumference...
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Worksheet
Curated OER

Circles

For Students 3rd - 4th
In this circles worksheet, students fill in 6 fill in the blank statements about circles and solve calculate the answers to 13 questions involving different measurements of circles.
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Worksheet
Math Mammoth

Circle

For Students 7th - 8th
For this circle worksheet, students find the area and circumference of circles and compare their size using percents. Students determine the are of composite figures made of circles and rectangles. This one-page worksheet contains six...

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