Worksheet
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Ratio of Similarity

For Students 10th
In this ratio of similarity worksheet, 10th graders solve and complete 20 different problems that include defining the ratio of similarity in various figures. First, they determine the ratio of similarity for large and small pairs of...
Worksheet
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Area of Sectors

For Students 10th - Higher Ed
In this area of sectors worksheet, students find the area of a given sector, area of inscribed figures, and area of shaded regions. This two-page worksheet contains 20 problems. An answer sheet is provided on the third page.
Worksheet
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Volume and Surface Area of Polyhedrea

For Students 8th - 11th
In this volume and surface area worksheet, students use given formulas to determine the volume and area of polyhedrea. This four-page worksheet contains examples, explanations and 32 problems. Answers are provided on the fourth page.
Worksheet
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Central and Inscribed Angles

For Students 10th
For this central and inscribed angles worksheet, 10th graders identify and solve 20 different problems that include determining inscribed angles and intercepted arcs. First, they determine the measure of point P if the given angles are...
Worksheet
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Addition and Subtraction of Rational Expressions

For Students 9th
In this rational expressions worksheet, 9th graders solve and complete 15 different problems that include adding and subtracting rational expressions. First, they define Least Common Multiple to get a common denominator in an equation....
Worksheet
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Properties of Quadrilaterals

For Students 9th - 11th
In this properties of quadrilaterals activity, students use the properties of quadrilaterals to find the perimeter, angle measurement or length of a missing side of a given polygon. Examples and explanations of the properties are...
Lesson Planet Article
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Math Sequencing Activities

For Teachers 2nd - 5th
Recognizing patterns and sequences in groups of numbers is an essential skill for all students to learn.
Lesson Plan
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Solving Equations Using Two Operations

For Teachers 5th - 7th
Need more detail in showing your class how to solve two-step equations and proportions? This lesson plan outlines the steps young mathematicians need to solve simple equations and check their results. 
Lesson Plan
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Area and Perimeter of Rectangles

For Teachers 3rd - 5th
Discover the difference between area and perimeter. Learners are grouped in twos and threes and each group has one advanced/gifted learner to serve as the peer helper. They receive manipulatives to help them determine the area and...
Lesson Plan
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Introduction to Fractals: Geometric Fractals

For Teachers 9th - 12th
Students explore the concept of fractals. In this fractals lesson, students discuss Sierpinski's Triangle using an applet. Students discuss the patterns involved with fractals. Students discuss the area of Sierpinski's triangle as the...
Lesson Plan
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Investigate the Rigid Motions of Reflection, Rotation, Translation, and Dilation

For Teachers 7th - 8th
Students investigate the rigid motions of reflection, rotation, translation, and dilation. This investigation be accomplished through classroom instruction and exploration using Geometer's Sketchpad.
Lesson Plan
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Clock Arithmetic and Cryptography

For Teachers 9th - 12th
Students investigate modular clock arithmetic and cryptography. They perform basic operations in modular (clock) arithmetic and encode and decode messages using simple shift and affine ciphers.
Lesson Plan
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Mathematics of Ornaments and Architecture

For Teachers 7th - 12th
Young scholars study African traditional architecture. They examine how African ornaments, wall painting and motifs use geometric shapes to express and explain the culture. They discuss the ornaments and architectural designs in the...
Lesson Plan
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Clock Arithmetic and Cryptography

For Teachers 8th - 10th
Students explore the concept of modular arithmetic and cryptography. In this modular arithmetic and cryptography lesson, students use applets to explore modular arithmetic using a clock and Caesar Ciphers. Students exchange their ciphers...
Lesson Plan
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Recognizing Patterns

For Teachers 6th - 8th
Students explore the concept of patterns. In this patterns lesson, students use applets to manipulate tessellations. Students predict the next number in a sequence by recognizing patterns.
Lesson Plan
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Play Dough Day

For Teachers 12th
Twelfth graders build a model of the following figures with the base from column I and the cross-section from column II. Draw the base with labeled axes on the graph paper and construct the figure on top of the base with the play dough...

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