Curated OER
Reflection Experiments
Seventh graders investigate with light rays. In this light lesson, 7th graders determine the angle of reflection using simple materials. They continue the investigation by exploring the theory that light which is not reflected or...
Curated OER
Concurrent Lines, Medians and Altitudes
In this geometry learning exercise, students construct angles and identify medians and altitudes. They use a compass and protractor to perform heir construction. There are 28 questions.
Curated OER
Altitude Locator
Students use protractors, strings, and straws to construct a device used to determine the height of tall objects. For this applied geometry lesson, students use common objects to construct a tangent height guide. They use principles of...
Curated OER
Problem Solving Using Power Polygons
Students investigate geometric shapes by creating figures on a plane. In this polygon lesson, students complete a worksheet based on the angles in a power polygon. Students identify the different types of polygons and define their...
Curated OER
Congruence: Practice
In this congruence worksheet, students trace figures, measure sides and angles, mark congruent sides and angles, then use a given diagram to answer questions and explain reasoning. Students also answer 2 test prep questions. Houghton...
Curated OER
Tessellation Trial and Error
In this interactive lesson, students review attributes of equilateral polygons. They are introduced to the concept of a tessellation. Using protractors and pre-cut shapes, students arrange a variety of tiles to create tessellations. They...
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Strongest Polygon
Students define and identify shapes by name. In this geometry lesson, students construct, identify and compare polygons based on the number of sides. They classify each shape based on their angle sum theorem.
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Friction Fanatics
Student and compare the three types of friction. In this physics lesson, high schoolers determine the coefficient of friction using the CEENBoT. They investigate how friction changes as the angle of the incline changes.
Curated OER
Multiple Images Activity
In this images activity, students use different sized mirrors to determine how many angles and images are reflected. Students complete 5 sets of directions.
Curated OER
Polygons
In this polygon instructional activity, students draw various polygons according to given specifications and find angle sums. A website reference for additional resources is given.
Curated OER
Leaping Lemurs! How far can you jump?
Students watch a segment of the PBS video which show the lemurs' ability to jump. In pairs, students collect measurement data involving each other's length of a standard step, a standing broad jump, and a long jump. They record their...
Curated OER
Surveying: 19 Chains and 50 Links
Through an interdisciplinary lesson plan, emerging engineers explore the history of surveying systems. After discussing various systems, they perform surveys on printable pages. Using their geometric skills, they physically stake out...
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Graph Both Crusts
Fourth graders calculate the angles and construct a pie graph of the percentages of the elements in the continental and oceanic crusts. Then they analyze the results. They can be assigned the task of researching the percentages.
Curated OER
Got Milk?
Middle schoolers measure the angles of a milk carton. They identify and label acute, right, and obtuse angles. Using appropriate tools, students determine the volume of a cube or a rectangular prism. Middle schoolers complete...
Curated OER
The Distance to an Unapproachable Point
Young scholars use geometry or trigonometry to measure the distance of a far off point. They verify their measurements using a tape measure to check their work.
Curated OER
Learning Lesson: The Shadow Knows II
Young scholars discover and practice how to calculate the circumference of the Earth. They measure the length of their shadows and use the distance they are away from the equator to complete the calculations. They discuss winter or...
Curated OER
Math: Arcs and Chords
Learners draw diagrams demonstrating how it is possible to two central angles to be congruent and their minor arcs are not congruent. In groups, they illustrate theorems with their constructed circles, create diameters of circles that...
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Volcanoes: Piles of Fire
Students investigate how particle size affects the angle of a volcano's slope.
Curated OER
Astronomy With a Stick
Students find the altitude of the Sun at 10 A.M., at solar noon, and at 2 P.M. by measuring the height of the gnomon and the length of the shadow at each time. They record the measurements in their notebooks for later conversion.
Curated OER
Rocket Design: Aerodynamics, Trajectories
Young scholars use science inquiry skills to build and launch a simple rocket, from several wooden launch pads of various angles, to determine what trajectory angle carry a rocket the greatest distance.
Curated OER
Speed Is the Key
Students design and build a model downhill ski course that proves to be the fastest course at the Finish Line. They apply what they explore angles, slope, speed, and surface conditions to find the fastest course in the US.
Mathematics Vision Project
Module 6: Congruence, Construction, and Proof
Trace the links between a variety of math concepts in this far-reaching unit. Ideas that seem very different on the outset (like the distance formula and rigid transformations) come together in very natural and logical ways. This...
K12 Reader
Punctuating Appositives
Where do the commas go? Kids rewrite a series of sentences using commas to set off the appositives in each sentence.
National Security Agency
Classifying Triangles
Building on young mathematicians' prior knowledge of three-sided shapes, this instructional activity series explores the defining characteristics of different types of triangles. Starting with a shared reading of the children's...