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Secant Line Approximation of the Tangent Line
Learners perform operation with secant and tangent lines. In this calculus activity, students find the derivative and relate it to the slope of a line. They differentiate between secant and tangent as they intersect a circle, using Cabri.
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Perspective
Students explain what is near and far in respect to the horizon line on a 2-d surface. They blend and use oil pastels correctly and explain the concept of a horizon line.
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Geo Jammin' - Day 5, Lesson 17: Geo Sakes Alive!
Second graders, given geometric instructions, try to create their own Geo George puppet.
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Learning by Sorting
Students sort Lego Duplo pieces after determining the attributes to classify them by. They work in pairs to sort a group of Duplo pieces and explain their process to others.
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Area of Parallelograms
Seventh graders review the process of finding the area of a rectangle and complete a couple of examples as a class. They discuss what a parallelogram is and what the formula would be for finding its area. They listen to an explanation...
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Geo Jammin' - Day 5, Lesson 16: Capturing "Lions" of Poetry
Second graders participate in the Author's Chair, which is placed in the front of the room. The puppet, Geo George, asks students to take out their poems, then brings them to the Author's Chair individually to share their poems with the...
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Mobile-ize
Second graders, using a minimum of four space figures, create a mobile. They use a "Draw" program to first plan out their figure.
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Fitness
Fourth graders determine how to design regular and semi-regular tessellations of the plane. They develop the ability to demonstrate why a tessellation covers the plane in this series of lessons.
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Introduction to Plates, Axles, and Gears
Pupils are introduced to the function and design of the following Lego pieces: beams, bricks, plates, axles, tires, hubs and bushings. They then work with a partner to build something using only these pieces.
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Determining Mercantile Volume of a Pine Tree
Fourth graders, acting as foresters, determine timber volumes as sawtimber or pulpwood for marketing. They find the marketable value of a tree using its diameter and volume.
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Geo-Folder
Second graders create a Geo-Folder based on geometric terms and concepts. They make a Table of Contents that guides them through the process of assembling a folder of completed activities.
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Million Dollar Gift
Third graders create a box big enough to hold a million dollars. This is a project fun to do near the winter holidays with inexpensive gifts included in the boxes. This hands-on lesson very effectively demonstrates the concept of volume.
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Math Who Am I?
In this math facts review worksheet, students read the description of each math term and try to guess what the answer is. Students may check their attempts by circling the third letter in the box which gives the answer.
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Measurement, Perimeter and Area
Students explore the concept of measurement. In this measurement lesson, students collect data about themselves such as height, finger length, neck circumference, foot length, and other body measurements. Students cut squares of...
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Honey ! I Blew Up The Bee!
Second graders complete a variety of bee-themed activities. They consider the importance of honeybees in food production, conduct Internet research, prepare foods using honey, complete puzzles and compile a portfolio of their work.
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Earth's Rotation
Fourth graders investigate the Earth's rotation. In this Earth's rotation lesson, 4th graders realize that the rotation of Earth causes the days and nights on Earth. Students break into groups and use a flashlight and a sphere to...
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Biology: Understanding Cellular Organelles
Students distinguish the differences between Prokaryotic and Eukaryotic cells. Using microscopes, they examine a variety of plant and animal cells. Working in groups, they draw and label plant and animal cells and show the mathematical...
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Perpendicular Segments in a Circle
High schoolers explore the concept of circles as they construct a circle using a program such as Cabri Jr. Learners construct a chord and a diameter that are perpendicular, then measure the bisected chord and notice that both sides of...
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Exploring the Centroid of a Triangle
Pupils examine the centroid of a triangle as they use Cabri Jr. to construct a triangle and its medians. The dynamic nature of the software allows learners to measure the lengths of the segments in the triangle and conjecture and verify...
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Investigating Segments in a Triangle
Pupils investigate segments in a triangle by constructing a triangle using Cabri Jr. They construct segments within the triangle that lie on the midpoints of the triangle's sides. Learners then compare the slope of base of the triangle...
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We Are Not Alone!!!
Eighth graders explore the area of astronomy. They explore Earth's neighboring planets. Students research a planet's characteristics. They develop a scale model of the solar system and a narrative about the planets.
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Perpendicular Bisector of a Line Segment
High Schoolers investigate the perpendicular bisector of a line segment. They use Cabri Jr. to construct the perpendicular bisector of a segment. The dynamics capabilities of Cabri Jr. allow your learners to observe the lengths of the...
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Investigating Segments in a Right Triangle
High schoolers explore the concept of right triangles as they construct a right triangle using Cabri Jr. Learners find the midpoint of the hypotenuse and construct a line from the midpoint to the vertex of the right angle. They then...