K12 Reader
Kinds of Angles
Have you ever wondered how circles and angles relate to each other? Read a passage about right angles, acute angles, and obtuse angles, and answer reading comprehension questions about the information you learn.
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Four Interesting Transformations of Functions (Part 1)
Understanding how functions transform is a key concept in mathematics. This introductory instructional activity makes a strong connection between the function, table, and graph when exploring transformations. While the resource uses...
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Cockroach Slope
Students identify the slope of linear functions. In this slope lesson, students collect data and graph it. They write equations with no more than two variables and use technology to explain their data.
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Grasping Geometry
Learners investigate geometric shapes in their environment, make a geometric design, and write paragraphs describing the design.
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Geometry House!
Fourth graders use computer drawing tools to create a house of geometric shapes.
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Plain Figures and Measuring Figures
Students investigate basic geometric concepts. In this geometry lesson, students explore solids through measuring and modeling. This assignment models the importance of understanding concrete objects in geometry.
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Transversal and Angles
Tenth graders identify angles formed by parallel lines and a transversal. Using meter sticks and bolts, they perform hands-on activities to demonstrate the properties of parallel lines and congruent angles. They color code diagrams to...
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Midpoint Formula in the Coordinate System
Students calculate the midpoint of a line. In this geometry lesson, students identify the different parts of the coordinate plane. They use the midpoint formula to find the middle of segments between a pair of coordinates.
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"Geotown" Scrapbook
Students create a scrapbook. For this geometry lesson, students use digital cameras to take pictures of geometrical concepts. Students use the pictures to create a "Geotown" scrapbook.
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Points of Intersection
Students solve systems of equations. For this solving systems of equations lesson, students look for the intersection of the two lines in the system. Students solve systems that have one solution, no solution, and infinite...
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The Search for Pythagoras' Treasure
Students identify and define properties of triangles. In this geometry lesson, students identify the missing sides and angles of right triangles. They use the rules of the Pythagorean Theorem to solve their problems.
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Introducing Angles
Sixth graders identify, compare and interpret the characteristics of polygons and angles in order to meet spatial sense, geometry and measurement standards. They also sort shapes into three categories, polygons (regular and irregular)...
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Camping with a Triangular Prism and Its Net
Learners differentiate triangular prisms from other prisms using nets. In this geometry lesson, students define the properties of a triangular prism and its symmetry. They build a triangular prism moving lines around.
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Math is Beautiful
Students explore how geometry is used on the composition of artworks by artists from different cultures. This lesson is equally suited for a Math or Art classroom at the late-elementary or early-middle school level.
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Angle Action 1,2 and 3
Students investigate angles through construction. In this geometry lesson, students use a protractor to identify the measurement of an angle. They identify angles cut by a transversal and two parallel lines.
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Addition & Subtraction Properties With Integers
Sixth graders use a number line to solve addition and subtraction problems. In groups, they play a game of "Human Number Line Relay." They use a deck of cards to randomly create addition and subtraction equations and physically walk a...
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Pythagorean Theorem
Students investigate the Pythagorean Theorem. In this seventh through twelfth grade geometery lesson plan, students explore the Pythagorean Theorem and its converse and use it to find the length of the missing side of a right...
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Application of the Pythagorean Theorem
Students find the length of the hypotenuse using the Pythagorean Theorem. For this geometry lesson, students solve for the different parts of a right triangle. They work the first problem with-the teacher then work on their own.
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What's Your Design?
Sixth grade students: design a stained glass window, submitting their initial plan detailing the measurements of all lines and angles. Seventh grade students: create a scale drawing of their own geometric family of four members.
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Reflections
Learners investigate image and pre-image. In this geometry lesson, students identify the reflection and rotation of different shape on a coordinate plane. They identify similarities and differences of image and pre-image of a reflection.
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Slope of a Function
Seventh graders explore the concept of the slope of a line. They see how to determine the direction of the line. Also students are introduced to the slope intercept algebraic expression in conjunction with the rise/run.
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Distance Formula
Students calculate the distance formula. In this geometry lesson, students find the distance between two points on a coordinate plane. They identify the four different quadrants.
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Online Interactive Math: Upper Elementary: Mixed Skills
In this online math activity, students complete a 20 problem multiple choice online interactive activity with mixed skills including geometry, rounding, and three digit multiplication.
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Symmetry in Shapes and Everyday Objects
Fifth graders discover lines of symmetry for shapes and everyday objects. In this lines of symmetry instructional activity, 5th graders use a butterfly outline to find lines of symmetry. Students analyze everyday objects for symmetry and...