Curated OER
Contructions and Conjectures
Students make constructions and conjectures. In this geometry lesson, students construct right, acute and obtuse angles using a straight edge and a protractor. They investigate parallel lines and the angles formed by the angles.
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Solving Systems vis Elimination
Students solve systems of equation using elimination. In this algebra lesson, students identify the type of solutions produces by systems of equations. They discuss the type of lines formed given a linear pair.
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Coordinates
In this coordinates learning exercise, 6th graders solve ten multiple choice questions by using their knowledge of coordinates on a grid. This is an interactive learning exercise.
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Angling Your Way Through a Picture
Students look at the geometry in an artwork. In this art history/geometry lesson, students research the artist Charles Sheeler and look at his painting Stacks in Celebration. They find the different types of lines, angles, and...
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Graphs
In this algebra worksheet, students calculate the point of intersection between a circle and a straight line. There are 5 questions with an answer key.
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Circles and Angles
Young scholars 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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Coordinate Connections
Sixth graders complete several activities that involve coordinates and graph paper.  They visualize and identify geometric shapes after applying transformations on a coordinate plane.  Finally, 6th graders draw and label a coordinate...
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Geometric Probability
In this geometry worksheet, 10th graders determine the probability of an event occurring based on the geometric sketch.  The one page worksheet contains fourteen problems.  Answers are included. 
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Angle Exploration and Classification
Students compare and contrast angles and identify them as acute, obtuse, right, or straight angles.  They create rays and angles using uncooked spaghetti, read and discuss key vocabulary terms, and complete a variety of geometry worksheets.
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Coordinating Coordinates
Third graders explore coordinate pairs and coordinate grids.  They use a grid on which each letter of the alphabet is assigned a coordinate pair, 3rd graders decipher a coded message.  Pupils compare coordinate pairs on a coordinate grid...
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Shapes Are Everywhere
Third graders  use various shapes to identify polygons and understand symmetry.  They explore pattern blocks noticing their similarities and differences, then share with other team members.  They draw 3 polygons in their journals and...
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Creating a Reflection
Investigate geometric reflections in this geometry lesson. Create geometric reflections that show the reflection across the x and y axis of a coordinate graph. Learners watch a teacher demonstration before proceeding on their own. They...
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Graphing Solutions
In this graphing solutions worksheet, 9th graders solve 13 various types of problems. First, they find the solution of each systems by graphing on the coordinate plane provided. Then, students solve each systems of equations...
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Polygons
In this polygons instructional activity, students read about and complete many activities involving triangles, angles, and symmetry. Students complete 17 pages of activities.
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Arc and Angles Formed by Secants and Tangents
In this calculus worksheet, students solve problems by finding the line of tangency and measure of the arcs and angles form by a secant line. There are 9 questions.
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What's That Tree?
Fifth graders identify trees along a nature trail. Using a dichotomous key, 5th graders answer questions to aid in their identification of trees along a specified nature trail. Observations are recorded in their science journals. Sample...
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Indirect Measurement with Similar Triangles
Students use similar triangles to find missing heights.  In this using similar triangles to find missing heights instructional activity, students use proportions to find the heights of missing side lengths.  Students find the...
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The Right Angle
In this algebra worksheet, 11th graders solve word problems creating a right triangle. Students determine the point and direction this turn of ninety degrees occurs. There are 4 questions with an answer key.
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Similar Triangles and Proportions
Pupils investigate similar triangles and proportions as they make conjectures about the length of sides of similar triangles. For this lesson plan, have your class construct similar triangles using Cabri Jr so that they share a common...
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Linear Functions
In this algebra worksheet, students identify and label functions as linear or not. They find the domain and range of each function. There are 15 multiple choice questions.
Willow Tree
Functions
What makes a function a function? Learn the criteria for a relation defined as a function both numerically and graphically. Once young mathematicians define a function, they use function notation to evaluate it. 
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You Must Still Think Yourself, CAS Can Only Help
Have the class learn about and make conjectures about a line intersecting a cubic.  In this making conjectures about a line intersecting a cubic lesson, young scholars draw lines that intersect a cubic at three different...
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Compass Rose
Young scholars describe the movement of the Earth as it relates to the sun. They construct a permanent compass rose and use it to find directions.
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Reflections
Tenth graders perform reflections on different geometric shapes. In this geometry worksheet,students define the concept of geometric reflections and find the coordinates of the reflection on a coordinate grid.