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Lesson Plan
Curated OER

Exploring Characteristics of Triangles

For Teachers 9th - 11th
Students draw triangles and explore the classification of each using the measures of interior angles and lengths of sides. They investigate the sum of the interior angles of various triangles and conjecture and prove the theorem: The...
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Lesson Plan
Curated OER

The Pythagorean Theorem

For Teachers 9th - 11th
Learners create both a visual and formal proof of the Pythagorean theorem, as well as view four additional geometric demonstrations of the theorem. They construct a square and conjecture the following theorem: The sum of the areas of...
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Lesson Plan
Curated OER

Exploring Centers of a Triangle: Part 2

For Teachers 10th - 12th
Students model and solve a real-world problem by constructing the centroid of a triangle. They explore relationships of the medians of a triangle and investigate how the centroid partitions each of the medians. Students investigate...
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Lesson Plan
Curated OER

Investigation the Derivatives of Some Common Functions

For Teachers 9th - 12th Standards
Students investigate the derivative of a function.  In this calculus lesson, students explore the derivatives of sine, cosine, natural log, and natural exponential functions.  The lesson promotes the idea of the derivative as a function...
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Lesson Plan
Texas Instraments

Angles in Circles

For Teachers 9th - 12th Standards
Teach your learners how to investigate the relationship between a central angle and an inscribed angle which subtend the same arc of a circle. The dynamic nature of Cabri Jr. provides opportunity for conjecture and verification.
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Worksheet
Curated OER

Investigating Patterns to Develop Logarithm Rules

For Students 11th - Higher Ed
In this logarithmic worksheet, students make conjectures regarding the rules for condensing and expanding logarithms by investigating patterns.  This is designed to be done as a group activity. 
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Lesson Plan
Key Curriculum Press

Properties of Special Parallelograms

For Teachers 9th - 11th Standards
Rhombuses, rectangles and squares are have special properties. In this lesson plan, young geometers investigate and make conjectures about diagonals, angles, and parallel lines of parallelograms. 
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Lesson Plan
Curated OER

Which Quadrilateral Is It?

For Teachers 9th - 12th
Students prove conjectures about geometric figures on the plane or in space using coordinate geometry. They develop fluency in operations with real numbers, vectors and matrices using mental computation or paper-and-pencil calculations...
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Lesson Plan
Curated OER

Get Your Numbers in Shape - TI-83

For Teachers 9th - 12th Standards
High Schoolers use the TI-83 calculator to produce a sequence, explore patterns and find a linear or quadratic equation for a given pattern. They use inductive reasoning to make conjectures about patterns. They find the Y-value of a...
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Lesson Plan
Curated OER

Angles Formed By Parallel Lines

For Teachers 6th - 12th Standards
Young scholars explore the concept of angles formed by parallel lines.They graph two parallel lines cut by a transversal, then measure the angles formed by the transversal and record the data in a table. Learners make conjectures about...
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Lesson Plan
Curated OER

Octagon Lesson Plan

For Teachers 10th - 11th
Students investigate octagons using words and shapes. In this geometry lesson, students discuss the shape of an octagon using physical and symbolic models. They make conjecture about the shape and relate it to the real world.
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Lesson Plan
Curated OER

Polydron Fun

For Teachers 9th - 11th
Students investigate nets as they relate to volume and area. In this geometry lesson, students use nets as a visual to deepen their understanding of surface area and volume of objects. They make conjectures about different objects and...
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Lesson Plan
Curated OER

Creating a Cyclic Quadrilateral

For Teachers 9th - 12th Standards
Identify and make conjecture about properties of cyclic quadrilaterals. Students use the TI Navigator to create different shapes and draw conclusions.
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Lesson Plan
Curated OER

Volume of a prism

For Teachers 10th
For this geometry worksheet, 10th graders determine the volume of various prisms.  The one page worksheet contains two problems.  Answers are not included. 
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Lesson Plan
Curated OER

The Effect of Acid Rain on Limestone

For Teachers 6th - 9th Standards
Pupils investigate the pH of rain water in this earth science lesson plan. They collect rain water from their area and explore the pH when lime stone is added, then they will use the data collected to conjecture as to the effect of acid...
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Lesson Plan
Curated OER

Cabri Jr. Inscribed Angles

For Teachers 9th - 12th Standards
Young scholars construct inscribed angles using Cabri Jr. They draw a circle on their graphing calculator, then construct an inscribed angle and measure its angle measures. Learners drag the inscribed angle around the circle. They make...
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Lesson Plan
Curated OER

Opposite Angles in a Cyclic Quadrilateral

For Teachers 9th - 12th Standards
Learners investigate cyclic quadrilaterals in this geometry lesson plan. They use Cabri Jr to explore the sum of the measures of opposite angles in a cyclic quadrilateral. The dynamic nature of Cabri allows students to form and verify...
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Lesson Plan
Curated OER

Segments Formed by Intersectiong Chords, Secants, and Tangents

For Teachers 9th - 12th Standards
Learners investigate the properties of segments formed which chords, secants, and tangents, intersect. The dynamic nature of Cabri Jr. allows students to form and verify conjectures regarding segment relationships.
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Lesson Plan
Curated OER

Betweenness and the Sum of Parts

For Teachers 9th - 12th Standards
High schoolers differentiate lines and angles using betweenness in this geometry lesson. They differentiate angles and lines using Cabri Jr. and analyze the data and make conjecture.
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Lesson Plan
Curated OER

Investigating the Slopes of Parallel and Perpendicular Lines

For Teachers 9th - 12th Standards
High schoolers investigate parallel and perpendicular lines. They use Cabri Jr. to construct and explore the relationships between the slopes of parallel and perpendicular lines. The drawing and measurement tools available with Cabri Jr....
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Lesson Plan
Curated OER

Angle Bisectors and Medians of Quadrilaterals

For Teachers 9th - 12th Standards
Young scholars investigate the properties of quadrilaterals formed by angle bisectors of a given quadrilateral and quadrilaterals formed by the medians of quadrilaterals. This Cabri Jr. lesson provides opportunity for conjecture and...
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Lesson Plan
Curated OER

Measuring Angles in a Quadrilateral

For Teachers 9th - 12th Standards
High schoolers explore quadrilaterals in this geometry lesson. They will draw a quadrilateral, measure the angles, and find the sum of the measures of the interior angles using Cabri Jr. The interactive capabilities of Cabri Jr. allow...
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Lesson Plan
Curated OER

Rotations in the Plane

For Teachers 9th - 12th Standards
Pupils investigate the properties of a rotation as they use technology (Cabri, Jr.) to observe the relationship between the pre-image and the image formed by the rotation. The lesson provides ample opportunity for learners to conjecture...
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Lesson Plan
Curated OER

Altitude, Median, and Angle Bisector of a Triangle

For Teachers 9th - 12th Standards
Learners investigate the special properties of an altitude, a median, and an angle bisector and explore how these special segments divide the area of a triangle. The dynamic nature of Cabri Jr. allows pupils to form and verify conjectures.

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