How many right triangles can you find in a prism, cone, or pyramid? Using right triangles to find lengths in three-dimensional figures is the focus of the lesson. After working with the Pythagorean Theorem to find missing side...

How many sides does that polygon have? Building directly from lesson number eight in this series, learners now find the area and perimeter of any polygon on the coordinate plane. They decompose the polygons into triangles and use Green's...

Present the class with a question on whether the water level of a pond will rise they take a large rock out of a boat and drop it into the pond. Groups come down on all sides of the question and try to justify their answers. The activity...

Even kindergartners can draw triangles in circles, but the assessment task requires a bit more geometric knowledge. Scholars investigate triangles that have a diameter of a circle as one of its sides. They must consider triangles that...

Laws are meant to be broken, right? Learners derive the Law of Sines by dropping a perpendicular from one vertex to its opposite side. Using the Law of Sines, mathematicians solve for various parts of triangles.

Don't just go through the steps to solve an algebraic equation, show learners how to balance an equation with visual models. The packet introduces the idea of mobile balances to reinforce the idea that both sides must match to make the...

Cubic crystals can have 6, 8, and even 12 sides. Here is a presentation that shows pupils three different kinds of cubic crystalline structures: cubic, body-centered, and face-centered. These structures are then applied to three...

Is losing cultural traditions the cost of social progress, or should people make stronger efforts to preserve these traditions? High schoolers watch a short film about the native Yup'ik people in Alaska and how they handle the shifts in...

Reinforce literacy skills using a six-sided die that focuses on phonics and story starters. Scholars roll, and show what they know about blends, plots, and more! 

Learn how to solve a triangle. Young mathematicians view a video that explains how to apply trigonometry to find missing sides and angles of a right triangle. A learning exercise tests their understanding of the concept.

Begin seeing the world through the lens of geometry! Use the 19th installment in a 25-part module to apply the Pythagorean Theorem to solve real-world problems. Individuals sketch situations resulting in right triangles such as the...

Get young people thinking about their lives and current topics of social justice, advocacy, gender, race, and identity. After examining several works by Barbara Kruger, participants select a tag with one of the questions printed on it,...

Young mathematicians connect vectors to geometric shapes by watching a video that expresses vectors in relation to the sides of geometric figures. They then apply what they learned by completing a worksheet of practice questions.

Pupils develop expressions to describe the total number of sides on an unknown number of rectangles and triangles. Expressions contain multiplication, addition, and parentheses.

Right triangles are so special! Use special right triangles to discover the trigonometric ratios. Pairs construct special right triangles and find the values of the ratios of the sides. In the process, they discover the ratios stay the...

Tree rings are slightly thicker on the south side of the tree because it receives more sunlight. Part two in a series of five lessons helps learners analyze tree rings to determine the environmental conditions that caused size...

Measure health as a triangle, with each side representing different aspects of health: physical, emotional/mental, and social. High schoolers complete a self-assessment of their health in all three areas before scoring their progress and...

Given a diagram of connected or overlapping triangles, individuals must find congruent parts using various properties. Pictures include reflexive sides and vertical angles amongst the marked congruent parts.

Calling all spades, diamonds, hearts, and clubs! Four teams compete against one another to collect all 52 cards in a deck. Each team lines up on one side of the gym, opposite of the deck of cards. Each team member takes turns running to...

Partner up the class. Break up one set of partners and assign one as a chaser and the other as a flee'er. The flee'er runs around the gym away from the chaser. If the flee'er is tagged, then he become the chaser. If the flee'er...

Are the people on the other side of the world standing upside down? Pupils discuss the relationship between movement and position words. The unit explores the concept of reference points through animation, modeling, photography, and...

After separating the class into two teams—crows and cranes—each team lines up in the middle line of the gym with their backs facing each other. If the teacher yells out "cranes!" then all the cranes run to their side of the...

Assign a tagger, and everyone else as runners. The tagger will tag people at random. Persons tagged must go to the other side of the gym court to perform a skill. Once they are done, they can go back in the game.

Have the class line up on one side of the gym. Choose one person to be the tagger. When the tagger yells "blob tag!" then the whole class runs across the gym while trying not to get tagged. Anyone that's tagged, now becomes part of the...