This amazingly extensive unit covers a wealth of geometric ground, ranging from constructions to angle properties, triangle theorems, rigid transformations, and fundamentals of formal proofs.  Each of the almost-forty lessons...

Anyone can draw a square, but can you CONSTRUCT a square? Here is a resource that challenges math scholars to create steps to finish their own construction. They test their ability to read and follow directions to complete a construction...

Triangles, triangles, and more triangles! In this second installment of a 36-part series, your young mathematicians explore two increasingly challenging constructions, requiring them to develop a way to construct three triangles that...

Drawing circles isn't the only thing compasses are good for. In this first installment of a 36-part series, high schoolers learn how to draw equilateral triangles by investigating real-world situations, such as finding the location of a...

Students investigate different types of building structures and how they are able to stand up to earthquakes. Through comparison they determine which buildings are better able to handle earthquakes than others. They create a building,...

There are an infinite number of points on a circle; can you find nine of them? After putting together a nine-point circle, pupils use constructions and their knowledge of triangle segments to determine the center of the circle. Learners...

Engineering design projects serve as great opportunities for collaborative problem solving. For this case, students work in small groups designing, building, and eventually testing a structure that meets a teacher-specified objective. It...

High schoolers investigate quadrilateral construction in this geometry lesson. They use Cabri Jr. to construct the different quadrilaterals from the quadrilateral hierarchy given minimal definitions. The lesson reinforces the difference...

Putting a rectangular object into a circular one—didn't the astronauts on Apollo 13 have to do something like this? Learners first construct the center of a circle using perpendiculars. They then discover how to inscribe a rectangle in a...

A kaleidoscope is constructed using polarizing polymer paper and then low-density polyethylene, high-density polyethylene, and polypropylene are all melted onto individual glass slides and examined through a microscope. The intent is to...

Rainwater doesn't stay where it falls. Learners use modeling to demonstrate how rainwater disperses once it hits the ground. The activity includes an investigation of the height of the water table in an aquifer and how it is affected by...

Enough with the talking, let's build something! In the fifth step in the engineering design process, young engineers build a prototype to test their ideas. The lesson walks them through the process of evaluating it step-by-step....

Learners explore Green Construction. In this lesson based on the experiences of Peace Corps volunteers, students gain insight into alternative construction in Guatemala. They examine the pros and cons of using alternative building...

Students are able to design, construct, evaluate and recommend materials for planned Eco-house to be built on campus. They investigate about good design and plan for construction. Students have a greater knowledge and appreciation of...

Students explore how the Romans engineered and built aqueducts. They read a manual, explore the Construct a Roman Aqueduct online activity, and construct an aqueduct that will transport two liters of water across a short distance in the...

Breaking the rules is one thing, proving it is another! Learners expand on their previous understanding of congruence and apply a mathematical definition to transformations. They perform and identify a sequence of transformations and use...

Have your class look at a granite specimen and describe what they see. They should note three distinct components. Discuss mixtures with them and how they might be separated, then send them to the lab to figure out how to take apart five...

Students investigate the effect that weight has on rocket flight. They construct a variety of straw-launched rockets that have different weights, observe what happens when the weight of a rocket is altered by reducing its physical size...

Stop the raindrops from getting into the house! Eager engineers learn about roofing history and waterproofing by nanotechnology. They get into groups and work on designing a waterproof roof for a small model house. The accompanying...

Looking for a fun and creative way to celebrate Pi Day? Then this is the resource for you. From a scavenger hunt and trivia contest to PowerPoint presentations and skills practice worksheets, this collection of materials is a...

Students investigate how rocks are modified into construction materials. In this building up and breaking down lesson plan, students explore what happens to building materials over time and how people modify natural materials. Students...

Learn transformations through constructions! Pupils use perpendicular bisectors to understand the movement of a reflection and rotation. They discover that the perpendicular bisector(s) determine the line of reflection and the...

Groups plan their escape carefully. Three three-tiered puzzles help a story character escape their situation, each involving integer sequences, transformations, and geometric constructions. The teacher resource includes...

Guide your learners step by step through the process of designing an original, independent student project. This resource includes a wealth of worksheets and materials, including student project checklists, timelines, primary and...