Curated OER
Orthocenter Of a Triangle
Students find the orthocenter of a triangle. In this geometry lesson, students identify where the altitudes meet in a triangle. They use Cabri software to explore acute, obtuse and right triangles.
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The Tale of the Feral - Care and Multiplication of Feral Cats
Students differentiate between a feral cat and a domesticated cat. In this cat lesson plan, students use the scientific method, calculate averages, solve story problems, and learn how a caretaker can help a feral colony live safely.
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Surface Area and Volume of a Cube
Students explore finding the surface area and volume of cubes and cylinders. They construct similar three-dimensional figures from a two-dimensional drawing. Students derive the formula for volume and surface area through examination...
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Symmetry: Theory, Reality and Art!
Students explore the concept of geometric symmetry. For this geometric symmetry lesson, students walk around their school and take pictures of objects that demonstrate symmetry. Students use Microsoft Paint to draw the lines of symmetry...
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The Luxor Hotel Contract
High schoolers determine the surface area of the Luxor Hotel, using the square feet of the base, volume, and the volume formula. They create a scale model of the triangular/pyramid shaped hotel.
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Would You Believe Your Eyes?
Students study the parts and functions of the human eye. They create dodecagons which are twelve-sided figures with twelve equal angles and share these with the class so that each student can begin to see how many different illusions can...
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Solving Problems Involving Chords, Radii, Tangents, Secants and Arcs within the Same Circle
Tenth graders apply their knowledge of angles related to a circle, radii, secants, tangents and chords of a circle. They practice using formulas related to a circle. They also apply what has been practiced to real life situations.
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Singapore Math and The Common Core
Tackle The Common Core math standards with some help from your friends in Singapore.
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The Next Dimension
Students explore the three dimensional Cartesian coordinate system and discuss how it is important for structural engineers in order to be able to describe locations in space to fellow engineers. They participate in a hands-on activity...
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Cubes-IV
Students examine the relationship between three dimensions and two dimensions by working with shadows of cubes and other models. Students work in groups and use Zome System Creator Kits to try and build a shape other than a cube that...
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Net "Working"
Upper elementary and middle schoolers explore the properties of various polygons. They use video, resource links, and engage in hands-on activities in order to construct geometric nets. This fine plan should lead to increased...
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Sequencing From Close To Far
Students explore how objects stay the same size and only "look" like they change when closer are farther from the object. They sequence aerial photos and satellite images from closest to farthest.
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Making and Describing Shapes
Explore the concept of creating and describing 2D and 3D shapes. Using geometry your scholars will describe the attributes of shapes and their properties. They explore and discover what happens when you combine shapes and then take...
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Opening A Cube
Fifth graders investigate mathematical concepts related to the construction of a three dimensional cube. They construct the cube from two dimensional patterns and compute the surface area. Students also define the faces, edges, and...