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Lesson Plan
Curated OER

Polygon Sum Conjecture

For Teachers 9th - 10th
Students calculate the sum of the angles of a polygon. In this geometry lesson, students use the interior angle formula of polygon based on the number of sides of the polygon. They identify the missing angle using algebra.
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Worksheet
Curated OER

Truncated Tetrahedron

For Students 6th - 8th
In this math worksheet, students read about the truncated tetrahedron and then create a paper model. It should look like a solid comprised of 4 regular hexagonal faces, 4 regular triangular. faces, 12 vertices and 18 edges.
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Worksheet
Curated OER

Rombicosidodecahedron

For Students 6th - 8th
In this math worksheet, students create a geometric paper model of a rombicosidodecahedron solid that is considered a challenging project.
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Worksheet
Curated OER

Rhombicuboctahedron

For Students 6th - 8th
In this math worksheet, middle schoolers develop their cognitive and motor skills through constructing the geometric solid of a rhombicuboctahedron
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Worksheet
Curated OER

Truncated Dodecahedron

For Students 9th - 11th
In this math worksheet, students build a truncated dodecahedron. This is a solid shape with 12 regular decagonal faces and 20 equilateral triangular faces. Students build this shape to assist in developing their cognitive and geometric...
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Lesson Plan
Curated OER

Unit Circle Triangle

For Teachers 11th - 12th
Students find the different ratios of a right triangle. In this geometry lesson plan, 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,...
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App
Oleh Yudin

iCrosss

For Students 5th - Higher Ed
Did you know that a soccer ball is very similar to a truncated icosahedron? Both have 32 faces, but while a truncated icosahedron is made up solely of flat hexagons, a traditional soccer ball has 12 pentagons and 20 hexagons, each curved...
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Lesson Plan
Curated OER

Comparing Measurements

For Teachers 3rd - 5th
Students explore measurements by completing worksheets in class. In this geometry lesson, students identify the basic measurement units in both the English and metric systems. Students analyze 2 and 3 dimensional objects and identify...
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Worksheet
Curated OER

Tetrahedron

For Students 6th - 8th
In this math worksheet, students construct a paper model of a tetrahedron. They create it to have four triangle faces, four vertices and six edges.
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Lesson Plan
Curated OER

Castles

For Teachers 10th - 11th
Students create a scale model to a castle using the dimensions they were given. They calculate the surface areas and volumes of each section of their castle.
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Lesson Plan
Curated OER

Scale Factor- Surface Area and Volume

For Teachers 9th - 10th
Students calculate the surface area and volume of shapes. In this geometry lesson, students create different scales and calculate the volume and area for each shape. They compare and contrast between the different scales and shapes.
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Lesson Plan
Curated OER

Plain Figures and Measuring Figures

For Teachers 10th - 12th
Students investigate basic geometric concepts. In this geometry lesson plan, students explore solids through measuring and modeling. This assignment models the importance of understanding concrete objects in geometry.      
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Lesson Plan
Curated OER

Captain Invincible and the Space Shapes

For Teachers 1st - 2nd
Students identify geometric solids. In this geometric shapes lesson, students listen to the teacher read Captain Invincible and the Space Shapes  by Stuart J. Murphy. Students then visit a web site where they identify types of triangles...
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Lesson Plan
Curated OER

Investigating: Finding the Volume

For Teachers 6th
Sixth graders explore geometry by utilizing colored cubes in class. In this volume lesson, 6th graders identify the different shapes they can create using their colored cubes and identify the formula for finding volume. Students create...
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Lesson Plan
Curated OER

Grade 2: Roll or Slide?

For Teachers 2nd
Second graders organize solids into categories, depending upon whether they will roll, slide or do both on a home made ramp. Students describe and compare attributes of three-dimensional geometric solids.
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Lesson Plan
Curated OER

Surface Area

For Teachers 10th - 11th
Students calculate the surface area of cubes, solids and cylinders. In this geometry activity, students define the surface area formulas for different prisms. They calculate the surface area with 100%, and 80% accuracy.
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Lesson Plan
Curated OER

Cubic Unit Models

For Teachers 4th
Fourth graders find the volume of solids. In groups, 4th graders use spinners to determine the dimensions of solids. They construct the shapes, creating a model of the figure Students count the cubes in the model to determine the...
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Lesson Plan
Curated OER

Folding to Make Shapes

For Teachers 2nd
Second graders identify different polygons and their attributes. In this geometry lesson, 2nd graders get to know polygons by studying the vocabulary and finding polygons in their classroom. They create these shapes and then find their...
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Lesson Plan
Curated OER

More Prisms/Nets

For Teachers 9th - 11th
Students calculate the volume and surface are of three-dimensional shapes. In this geometry lesson, students use the nets to prove their calculations of shapes. They identify the different parts of a solid using the nets.
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Lesson Plan
Curated OER

Surface Area of Prisms

For Teachers 9th - 11th
Learners calculate the surface area of different prisms. For this geometry lesson, students identify the shapes of solids based on the properties of that solid. They calculate the surface area using nets and properties of prisms.
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Worksheet
Curated OER

Concept of Volume: the Unit Cube

For Students 10th
In this geometry worksheet, 10th graders are asked to find the volume of different polygons. They use the formula for volume dealing with the different shapes. There are 60 problems.
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Lesson Plan
Curated OER

2D Polygons and 3D Nets

For Teachers 9th - 11th
Young scholars compare and contrast two dimensional polygons and three dimentional nets by examining the differences in drawings. They create three dimensional shapes and label the faces, edges, and vertices. After creating the shapes,...
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Lesson Plan
Curated OER

Faces, Vertices, Edges

For Teachers 9th - 10th
Learners identify the parts of three dimensional objects. In this geometry lesson, students find the number of faces, edges and vertices. They differentiate between prisms and polyhedra.
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Lesson Plan
Curated OER

Sketching Cylinders

For Teachers 9th - 11th
Students create nets of cylinders. In this geometry lesson plan, students calculate the surface area of cylinders and other solids. They show their understanding of three-dimensional shapes by solving problems.

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