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Classroom Activities Author Level Technology

Stem and Leaf Plots

What is a Stem and Leaf plot and how can you generate them on your TI-nspire? This activity includes a range of data that can be plotted on Stem and Leaf plots. Students are required to extract a range of information from the plot and discuss the benefits of this representation and also the limitations. 
  • Aust Senior
  • TI-Nspire™ CX CAS
  • TI-Nspire™ CX
6

Fly Straight

You won't believe your eyes. How is this possible. This is an amazing sequence. Students use some basic coding to generate a sequence in order to expedite calculations. The result is really cool. You have to try the activity to see the result. 
  • Middle
  • TI-Nspire™ CX CAS
  • TI-Nspire™ CX
4

Tangent Challenge

An interesting question, so many ways to solve it. The question sheet (provided) includes scaffolding to help students solve the problem, however teachers are also encouraged to let students explore the problem. A simple geometric solution exists, but the problem is equally solvable using calculus. Students studying Specialist Mathematics also may like to use implicit differentiation, alternatively, some simple geometry can again be applied. So many ways to solve it. 
  • Aust Senior
  • TI-Nspire™ CX CAS
5

Logos Arithmos

John Napier created logarithms to help speed up multiplication, he achieved this by turning multiplication into addition via logarithms. Understanding how this works can help students understand why logarithms were created, how and why we use them. A combination of a virtual slide rule, graphs and tables help students understand logarithms.
  • Aust Senior
  • TI-Nspire™ CX
  • TI-Nspire™ CX CAS
1

Rover Geometry

Students learn basic programming commands to drive the TI-Rover, drawing shapes such as squares, circles, regular triangles and stars. In addition to the coding skills, students also learn to be persistent and resilient problem solvers. Through trial and error, students use the results of their program to refine and improve their result. 
  • Middle
  • TI-Nspire™ CX CAS
  • TI-Nspire™ CX
7

Fetch

This is a basic activity designed to introduce students to coding with the TI-Rover. The activity is a great precursor to Rover Geometry.A complementary outcome is student persistence for irresolution. If at first they don't succeed, students simply try and try again; each time learning from their previous efforts. 
  • Middle
  • TI-Nspire™ CX CAS
3

Consul Monkey

Consul the Educated Monkey was a mechanical toy from 1916. The toy relied on geometric properties to perform the multiplication tables. In this activity students use a virtual representation of the toy to analyse and explain how the geometry works and apply new ideas for other applications.
  • Middle
  • TI-Nspire™ CX
  • TI-Nspire™ CX CAS
5

Circumcircles

A circumcircle is a unique circle that passes through all three of a triangle's vertices. In this activity students start with the geometrical entity and then transfer this to the Cartesian plane where they determine equations to lines (given two points), equations to lines (given point and gradient), intersection of two lines and finally the equation to a circle. Once students have completed the prescribed points they are required to come up with their own three points, a TI-nspire teacher file generates all the required equations given three starting points.
  • Aust Senior
  • TI-Nspire™ CX
  • TI-Nspire™ CX CAS
2

Circular Probability

A triangle is formed such that two vertices are on the base of a unit square and the third vertex somewhere within the square. What is the probability that the angle at this third vertex will be greater than 90 degrees? A diagram helps to provide a visual, the interactive nature of the TI-nspire file makes it easy for students to explore, estimate the probability and determine a geometrical approach to solving the problem. 
  • Aust Senior
  • TI-Nspire™ CX
  • TI-Nspire™ CX CAS
3

Eye Spy

Students use calculus to determine the maximum size of the iris (circle) that just fits inside an outline of the eye defined by two bell shaped curves. The activity uses some basic differential calculus, introduces simple substitutions to eliminate variables and handy techniques for simplifying problems. The problem is much easier than it looks!
  • Aust Senior
  • TI-Nspire™ CX CAS
  • TI-Nspire™ CX
2

3D Equations

Equations of 3 variables can be visualised in three dimensions. In this activity students are provided with 5 sets of three equations. Supporting the understanding and development is a 3D graph for each equation set. Students can see how pairs of graphs interact or all three. An estimate for the point of intersection is gained from the 3D graph. Students are then provided with a scaffolded learning environment and resources where they progressively eliminate a variable. What does it mean graphically when a variable is removed? 
  • Aust Senior
  • TI-Nspire™ CX CAS
19

Imaginary Explosions

What happens when you square an imaginary number?  Does it get bigger or smaller? How can you tell if the number will get bigger or smaller? This seems straight forward enough, but a really surprising result occurs if you add something after you square, then repeat, square and add, square and add. While the activity involves only adding, squaring and graphing complex numbers, the results are truly amazing. 
  • Aust Senior
  • TI-Nspire™ CX
  • TI-Nspire™ CX CAS
7

Ball Bounce

Students collect data for a bouncing ball using a CBR connected to their calculator.  Consecutive ball bounces are modelled using combinations of translational, intercept and standard form of a quadratic equation. Each student has their own data so each student’s working and answers will be unique making it the ideal assessment task!
  • Middle
  • TI-Nspire™ CX CAS
  • TI-Nspire™ CX
13

String Art 84

This task provides a creative way to reinforce linear function algebra with Years 9–10 students land to learn about transformations of sets of such functions. The focus is on the students discovering what effect each parameter in the function (e.g. gradient & y-intercept) might have on the shape and location of the set of graphs.
  • Aust Senior
  • Middle
  • TI-84 Plus CE
0

Finance Problems

What is the difference between simple and compound interest? Visually we can see that simple interest is linear and compound is non-linear. These visuals can be used to improve student understanding of what a significant difference this can make over time. Dynamic representations illustrate how increasing the number of compounding periods and interest rates dramatically effect the contribution compounding interest has to the overall balance. Recursive techniques, including spreadsheets and formulas help reinforce the concepts numerically. See how you can retire with a million dollars on just $60.00 per week.
  • Aust Senior
  • TI-Nspire™ CX CAS
  • TI-Nspire™ CX
35