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Lesson Plan
Curated OER

Size Riddles

For Teachers 2nd - 6th
Young scholars investigate shapes and sizes by creating a riddle.  In this geometry lesson, students read one of two books and investigate facts about an object's size.  Young scholars write a riddle using the facts they have...
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Lesson Plan
Curated OER

Parallelism in Our Everyday World: Parallel Lines and Beyond

For Teachers 9th - 10th
Students broaden their outlook on geometry in their everyday environment. They explore the properties of parallel lines and parallelograms and discover ways to prove the existence of parallel lines and discuss the concept of parallel lines.
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Lesson Plan
Curated OER

Introduction to Parallel Lines in Euclidean Space and in Spherical Space

For Teachers 8th
Eighth graders are introduced to the basic concepts of Geometry and their definitions in Euclidean space. They draw and define the following terms: point, line, and line segment. Students also define the terms colliner and...
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Lesson Plan
Curated OER

Lines in the Coordinate Plane

For Teachers 8th - 9th
Students graph lines in a coordinate plane. In this geometry lesson, students graph lines on a coordinate plane, and identify the slope. They classify the lines as parallel or perpendicular and write an equation of a given line.
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Lesson Plan
Curated OER

Scenario Challenge

For Teachers 8th - 10th
Students create a quilt, using different patterns. In this geometry lesson, students apply prior knowledge as they use different patterns to help them create a quilt using transformations and geometric shapes.
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Lesson Plan
Curated OER

Arc Length Lesson

For Teachers 9th - 11th
Students find the length of the arc of a circle. In this geometry lesson, students calculate the length of an arc and find the measure of the central angle given the length of the arc. They convert between linear and angular speed. They...
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Lesson Plan
Curated OER

Shape Hunt

For Teachers Pre-K - 1st
Students explore two-dimensional and solid shapes. In this shapes and patterns geometry activity, students work with a partner to create identifiable objects using tangrams. Students describe the attributes of their shape and their...
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Lesson Plan
Curated OER

Complex Area Problems

For Teachers 9th - 11th
Students calculate the area of different polygons. In this geometry lesson, students find the area of complex polygons. They solve word problems using rates and distances.
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Lesson Plan
Curated OER

Egg-streme Tesselation

For Teachers 6th
Sixth graders view a video of tessellating an egg shape. They focus upon the problem solving strategies used and how tessellation geometry was used to construct the three dimensional figure. They create their own tiling patterns.
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Lesson Plan
Ohio Department of Education

I Can Name that Angle in One Measure! - Grade Eight

For Teachers 7th - 9th Standards
Collaborative groups work with geometry manipulatives to investigate conjectures about angles. They create a graphic organizer to use in summarizing relationships among angles in intersecting, perpendicular and parallel lines cut by a...
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Lesson Plan
Curated OER

Geometric Angles

For Teachers 8th - 10th
Students explore angles and their use in Geometry. Students investigate three different kinds of angles: obtuse, acute, and right angles through an online activity. They identify pairs of angles with special relationships: vertical,...
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Lesson Plan
Curated OER

Tantalizing Tangrams

For Teachers 4th - 5th
Students create puzzles of animals based on the 12-animals cycle of the Lunar Calendar. They use logical or spatial relationship skills. Students comprehend the mathematical term geometry. They research the history, beliefs of the...
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Lesson Plan
Curated OER

Archaeology: Digging in the Classroom

For Teachers 3rd - 6th
Students explore how an archaeologist works and makes discoveries. In this archaeology lesson, students participate in a simulation in which they excavate broken pottery. Students use measurement, geometry, and observation skills during...
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Lesson Plan
Curated OER

Area of Polygons

For Teachers 9th - 11th
In this geometry worksheet, students analyze the different properties of parallelograms related to their angles, sides and diagonals. There are 5 problems with an answer key.
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Lesson Plan
Curated OER

Naming Shapes

For Teachers 4th - 6th
Students study geometric shapes and practice naming them properly. In this geometry instructional activity, students work in groups to give definitions of the vocabulary to each other in their own words. Students also visit a lower grade...
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Lesson Plan
Curated OER

Circles

For Teachers 10th
Tenth graders explore and define the radius and diameter of a circle. In this geometry lesson, 10th graders calculate the circumference and area of a circle using real world objects and shapes. They discuss chords and lines tangent...
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Lesson Plan
Curated OER

Special Angles on Parallel Lines

For Teachers 10th
Tenth graders investigate parallel lines and their special angles cut by a transversal. In this geometry lesson, 10th graders identify and find corresponding, alternate interior, and alternate exterior angles formed when parallel lines...
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Lesson Plan
Curated OER

Constructing Perpendicular Bisectors

For Teachers 10th
Tenth graders investigate parallel lines and the angles formed when cut by a transversal. For this geometry lesson, 10th graders construct perpendicular lines and discuss midpoint, segments and perpendicular bisectors. They relate...
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Lesson Plan
Curated OER

Bisector Construction

For Teachers 10th
In this geometry worksheet, 10th graders construct parallel and perpendicular lines using a compass and a straight edge. There are 4 construction questions with an answer key.
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Lesson Plan
Curated OER

Circles and Angles

For Teachers 9th - 11th
Students identify tangents, chords and secants. In this geometry lesson, students graph circles and identify angles created by secant lines, tangent lines and chords.
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Lesson Plan
Curated OER

Amazing Fibonacci

For Teachers 8th - 12th
Students integrate the patterns of Fibonacci into music. In this geometry lesson plan, students apply the concepts of recursion, pattern and Phi or Golden Ratio to composing and playing music on various instruments. They lesson plan is...
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Lesson Plan
Curated OER

Mira, Mira on the Wall: Reflections

For Teachers 9th - 10th
Learners investigate and perform reflections and symmetry. In this geometry lesson, students compare and contrast the relationship between reflections and symmetries.
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Lesson Plan
Curated OER

Area Unit

For Teachers 9th - 11th
Students solve the area for parallelograms,squares, rectangles, trapezoids, and triangles. In this geometry lesson plan, students compare and contrast two dimensional shapes and apply their properties to solving real life scenarios. This...
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Lesson Plan
Curated OER

Comparing Area and Perimeter

For Teachers 9th - 11th
Students solve problems by finding the perimeter and area of an enclosed area. In this geometry lesson, students differentiate between the area and the perimeter. They see how they relate and how to use it to maximize an enclosed area.

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