Curated OER
Area And Perimeter Using Pentominoes
Third graders engage in an enrichment lesson exploring the concepts of area and perimeter. They construct new pentominoes that are 3 times the size of normal ones and then identify the area and perimeter measurements. They then create a...
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Complexity Madness
After introducing the concept and formula for finding the area of a square, try this lesson plan. Fifth graders will use their prior knowledge to break apart various shapes in order to determine area. This lesson plan includes several...
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Euclidean Direct Proofs
Learning how to prove theorems in geometry can be challenging. This resource explains what a proof is, and the different styles for proofs. It also contains links to web-based practice problems that help guide learners though example...
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Adding and Subtracting Algebraic Expressions (Combining Like Terms)
Everyone loves math when it includes food! This instructional activity tries to take the notion of combining like terms in algebra and comparing it to sorting apples and oranges. It takes a step-by-step approach to helping young scholars...
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Can You Build It?
Students investigate the concept of perimeter. They design there own figure and measure the perimeter of it. The lesson plan is given the context of the shape being a path that is traveled by a ladybug. This provides the shape of the...
Improving Measurement and Geometry in Elementary Schools
The Sum of the Interior Angles of a Polygon
Junior geometers discover that polygons can be decomposed into triangles and that the number of triangles can be determined by a rule. Note that the Geometer’s Sketchpad® software is required to carry out all components of this...
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How Do You Measure Up?
Students measure their body. For this measurement lesson, students use a string to measure their height and the circumference of their head. They record this information on the worksheet provided and answer questions as a group.
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Similar Situations
Students explore intersecting lines. For this intersecting lines lesson, students investigate shapes consisting of parallel, perpendicular, and similar lines. Students investigate these lines in shapes around them.
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History / Introduction of Pythagorean Theorem
Learners explore Pythagoras and the history behind his theorem. They work together to solve a proof that is embedded in the lesson.
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Searching for Angles and Lines
Students work to find and reinforce concepts related to lines and angles. They identify the characteristics of shapes that have one, two, and three dimensions. The students also work on definitions related to the geometry of shapes.
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Matrices at the Speed of Light!
Perform operations using matrices in this algebra lesson. Middle schoolers add, subtract, and multiply matrices. Additionally, they solve systems of equations using matrices.
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THE TRIANGLE INEQUALITY IN ANIMATION
Students open up the script to generate the sketch. They examine the viewing of the animation of a triangle. Students incorporate writing skills across the curriculum within this lesson.
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Area of Polygons
Students engage in a lesson that is about the concept of polygons and focuses upon finding the area. They use formulas provided in the lesson in order to solve problems given by the teacher for independent practice. Geometric figures are...
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Exploring the Definition of Reflection
Pupils practice using a protractor and ruler to draw various points and lines. Using a computer, they draw the points and lines in the program and describe the differences between their drawing and the computer's drawing. They complete a...
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Track Traces
Students explore animal characteristics by participating in an animal anatomy activity. In this animal tracks lesson, students identify the differences between specific animals and the shape of their footprints. Students utilize a...
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Geometric Basketball Court
Young scholars calculate the area and perimeter of a basketball court. In this geometry lesson plan, students differentiate between similarity and congruence of geometric objects. They test conjectures and use it to solve problems.
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CSI Investigation of Congruence and Similarity
Students differentiate between similarity and congruence using polygons. In this geometry lesson, students label triangles based on their properties. They find missing sides and angles using the interior sum theorem.
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Mathematics in Robotics
Students build and create using math. In this geometry lesson plan, students differentiate between congruent and similarity as they observe polygons. They create robots with different functions using properties of geometry.
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This Building is Tall
Pupils calculate the perimeter of shapes. In this geometry instructional activity, students relate properties of polygons to the real world. They find length, midpoint and slope.
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Cones, Cylinders, Spheres
Students classify polygons by name and shape. For this geometry lesson, students identify the lateral surface of each conic. They differentiate between cones, cylinders and spheres.
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Sketching Spheres
Students investigate spheres through sketches. In this geometry lesson, students sketch two and three dimensional shapes creating nets. They find and differentiate between the nets for prisms, pyramids, cones, cylinders and spheres.
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Surface Area of Prisms
Students calculate the surface area of different prisms. In 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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Applications of Properties of Quadrilaterals in the Coordinate Plane
Students explore the concept of quadrilaterals. For this quadrilaterals lesson, students use the slope formula, midpoint formula, and distance formula to justify that a given quadrilateral is a parallelogram.
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Duplicating Segments and Angles
Tenth graders investigate geometric construction. In this geometry lesson, 10th graders explore the procedure for copying an angle and a segment. The lesson emphasizes the difference between a sketch, a drawing, and a...