Similarity and Dilations
Students will discover properties of similar figures using the TI-89 and CABRI Geometry II to use dilations to dynamically manipulate figures. (Topic - Similar Figures and the Role of Dilations)https://education.ti.com/en/activity/detail/similarity-and-dilations
What's the Trig?
Students will be introduced to right triangle trigonometry. They will use the TI-89 and Geometer's Sketchpad to construct a right triangle and calculate sin, cosine, and tangent of various acute angles. (Topic - Right Triangle Trigonometry)https://education.ti.com/en/activity/detail/whats-the-trig
Surface Area of Cylinder Song
Here's a silly song that I use with my classes to help them remember how to find the surface area of cylinders. My students actually suggested that I submit this!https://education.ti.com/en/activity/detail/surface-area-of-cylinder-song
Parallel or Perpendicular-What's Your Inclination?
This activity has students discover the relationship between parallel and perpendicular lines and their slopes. After constructing these objects using CABRI Geometry II for the TI-89, slopes are measured. (Topic - parallel and perpendicular lines)https://education.ti.com/en/activity/detail/parallel-or-perpendicularwhats-your-inclination
Parallelograms - Discovering Their Properties
Students use the TI-89 with CABRI™ Geometry to discover properties of parallelograms. They will construct a figure and use the definition to disvoer the figure is a parallelogram. (Topic - parallelograms)https://education.ti.com/en/activity/detail/parallelograms--discovering-their-properties
Properties of Parallelograms
In this activity, you will construct the geometric object by following the instructions below, and then answer the questions about the object.https://education.ti.com/en/activity/detail/properties-of-parallelograms_4
Angle Theorem
Students use the Cabri Geometry II Plus software to investigate the relationship between angle and ratio in a right triangle.https://education.ti.com/en/activity/detail/angle-theorem
Proportional Flag
Students will use the concepts of similarity to create a scale drawing of the national flag, that is large enough to cover most of a football field.https://education.ti.com/en/activity/detail/proportional-flag
What's the Angle?
Students discover properties of interior and exterior angles of convex polygons using the TI-89 and Geometer's Sketchpad. (Topic - Interior and Exterior Angles of Convex Polygons)https://education.ti.com/en/activity/detail/whats-the-angle
What's the Spin?
Students discover properties of rotations using the TI-89 and CABRI Geometry II by rotating a triangle around a point and through a specified angle. They will discover the definition of a rotation. (Topic -- Rotations and their relation to reflect)https://education.ti.com/en/activity/detail/whats-the-spin
Set Design
Students will use similarity concepts, and the dimensions of the carvings on Mt. Rushmore to create a proportional representation of the carvings for a stage backdrop.https://education.ti.com/en/activity/detail/set-design
Quilt Blocks
Students will see how fractions, decimals, and percents are interrelated, then explore and learn how to convert between them. Students will also practice estimating.https://education.ti.com/en/activity/detail/quilt-blocks
Slam Dunk!
Students will use radius, diameter, length, width, and height to find volume of spheres and prisms as well as area of circles and rectangles. They will discuss when to use a two-dimensional measurement vs. a three-dimensional measurement using spatial reasoning.https://education.ti.com/en/activity/detail/slam-dunk
Dividing Notes
Students create an altered musical melody by dividing fractions. They compute the value of notes in terms of fractions and make their sum equal to the time signature.https://education.ti.com/en/activity/detail/dividing-notes
Number and Operation Sense: Rational Numbers
Students learn to use the calculator to collect a set of data in order to identify patterns that illustrate important rational number concepts: the relationship between rational numbers and division, and equivalent fraction and decimal forms for rational numbers.https://education.ti.com/en/activity/detail/number-and-operation-sense-rational-numbers
Thrift Store Markdowns
Students will calculate a series of discounts using increasing unit fractions.https://education.ti.com/en/activity/detail/thrift-store-markdowns
Match the graph
Students use the Cabri Geometry II Plus software to reflect points from a graph across the axes.https://education.ti.com/en/activity/detail/match-the-graph
Area of Triangle
This Cabri Geometry activity enables students to review the relationship between the height of a triangle and its perimeter and area.https://education.ti.com/en/activity/detail/area-of-triangle
Conics in Geometry
This lesson has students construct 3 conic sections through geometric definitions. Using the CABRI™ Geometry II application for the TI-89, students construct a parabola, an ellipse, and a hyperbola. (Topics - geometric shapes.https://education.ti.com/en/activity/detail/conics-in-geometry
Dilation
Students use the Cabri Geometry II Plus software to investigate the geometric property of dilation. They vary the scale factor and examine the effect on the dilation of a triangle.https://education.ti.com/en/activity/detail/dilation
Going in Circles - Inscribed Angles
This lesson has students discover properties of inscribed angles in a circle. Students use the Geometer's Sketchpad application for the TI-89 to construct a circle and an inscribed angle. (Topic - circles)https://education.ti.com/en/activity/detail/going-in-circles--inscribed-angles
Exploring the Unit Circle
In this activity, students explore the properties of a unit circle and its mapping functions.https://education.ti.com/en/activity/detail/exploring-the-unit-circle
Finding the area of a perfect polygon.
To find the area of a "regular polygon."https://education.ti.com/en/activity/detail/finding-the-area-of-a-perfect-polygon
Cottage Water Problem
Students use the Cabri Geometry II Plus software to solve a geometry problem. They move the vertex point that is common to two right triangles along the base to find the smallest possible sum of the length of the hypotenuse.https://education.ti.com/en/activity/detail/cottage-water-problem
Pizza Extravaganza
Students will conduct a survey of the class to determine favorite pizza toppings. They use this sample information to predict the preferred toppings for the school and use the TI-15 to help them with the calculations to plan a school-wide pizza party.https://education.ti.com/en/activity/detail/pizza-extravaganza