Illustrative Mathematics
Why Does SSS Work?
While it may seem incredibly obvious to the geometry student that congruent sides make congruent triangles, the proving of this by definition actually takes a bit of work. This exercise steps the class through this kind of proof by...
Illustrative Mathematics
Joining Two Midpoints of Sides of a Triangle
Without ever using the actual term, this exercise has the learner develop the key properties of the midsegment of a triangle. This task leads the class to discover a proof of similar triangles using the properties of parallel lines cut...
Learning to Live
Attributes of a Civil Society
What makes a society civil? High school freshmen search for examples of justice, kindness, peace, and tolerance in news media and brainstorm how they can promote these attributes in their schools, communities, and world. The well-rounded...
Curated OER
Making a Two - Colorable Map
Pupils make a two - colorable map by following directions given to them. In this map lesson plan, students follow 5 sets of directions and discuss their activity.
EngageNY
End-of-Module Assessment Task - Geometry (module 1)
Have you hit a wall when trying to create performance task questions? Several open-ended response questions require a deep level of thinking. Topics include triangle congruence, quadrilaterals, special segments, constructions, and...
Virginia Department of Education
Pythagorean Theorem
Investigate the meaning of the Pythagorean Theorem through modeling. After comparing the area of the square of each side, individuals cut triangles and squares to facilitate the comparison.
Curated OER
Quilt Patch Proof
Students construct a convincing argument that the same amount of fabric is needed for each color of quilt being made in a specific design. They justify the relationship between vertical angles and the sum of the interior angles. Students
Flipped Math
Unit 6 Review: Similar Figures
After a short review of the material from the Similar Figures Unit, pupils work through 18 problems to further practice the skills from the unit. Scholars apply those skills in the application problems at the end of the review.
Curated OER
Reflections and Equilateral Triangles
Your learners collaboratively find the lines of symmetry in an equilateral triangle using rigid transformations and symmetry. Through congruence proofs they show that they understand congruence in terms of rigid motions as they prove...
Curated OER
Comprehension Strategies: Drawing Inferences
The proof is in the details! A richly detailed plan provides clear examples of how to draw inferences from text and how to provide support drawn directly from the text.
Science Matters
Earthquake Building/Shaking Contest
Japan is one of only a handful of countries that constructs buildings that are almost earthquake proof. The 13th lesson in the 20-part series challenges scholars to build structures to test against earthquakes. With limited materials and...
Curated OER
Getting it Right! An Investigation of the Pythagorean Theorem
In order to learn about the Pythagorean Theorem, young mathematicians investigate relations and patterns between different sides of a right triangle to look for possible relations among the squared sides. Once they have established the...
Curated OER
Keyboarding: Formatting A Report Using MLA Style
Introduce your class to the MLA style of formatting. In addition to studying the formatting, learners improve language skills and review word processor features. They use the Interwrite SchoolPad for the first time to assist in proofing...
Curated OER
The Right Stuff
Studentsare introduced to the Pythagorean Theorem by exploring right triangles and the squares built on each side. They apply the Pythagorean Theorem to real-world problems. Students u se informal and nonformal arguments of proof (i.e.,...
Illustrative Mathematics
Is This a Parallelogram?
If both pairs of opposite sides of a quadrilateral are congruent, is the quadrilateral a parallelogram? This task asks learners to determine the answer and to support their answer with a proof. The resource includes a commentary for...
Curated OER
Interactivate - Lines, Rays, Line Segments, and Planes
Students explore lines, rays, line segments, and planes. In this math lesson, students discuss the math concepts and direct their instructor in graphing functions. Students collaborate in graphing additional functions.
Curated OER
El Nino Lesson
Students compare graphs of weather occurrences. In this environmental lesson plan, students will being using the website to gather weather related information for a certain time period. The students will then graph the data that will be...
Illustrative Mathematics
Midpoints of the Sides of a Paralellogram
This task asks learners to prove that the segment joining the midpoints of two sides of a parallelogram is both congruent and parallel to an adjacent side of the parallelogram. The activity would be good to use in a discussion about how...
Curated OER
Fool-proof Yogurt
Students make yogurt from powdered milk. In this yogurt experiment activity, students combine powdered milk, warm water and plain yogurt. They mix up the ingredients and put it in an insulated cooler for 6-8 hours.
Curated OER
The Big Burp: Where's the Proof.
Students explore the Cambrian explosion and Paleocene extinction events. In this climate change lesson, students read articles to link evidence they find to extinction and climate change. Links to the articles are included in the lesson.
Curated OER
Proof It
Fourth graders complete a worksheet. In this spelling lesson, 4th graders complete a timed activity where they identify misspelled words and write their correct spelling.
Curated OER
Fool Proof Printmaking
Students explore historical technology by participating in a printing activity. In this printing block lesson plan, students identify how mass papers were printed in the past by using blocks repeatedly. Students create their own printing...
EngageNY
The Power of Algebra—Finding Pythagorean Triples
The Pythagorean Theorem makes an appearance yet again in this lesson on polynomial identities. Learners prove a method for finding Pythagorean triples by applying the difference of squares identity.
Curated OER
Relative Ratios
Students discover that proportions are made up of equal ratios each containing the same building blocks. They, using the Internet, apply their knowledge of direct relationships and proportions to problems in planetary science.