Angle Theorems

Traditional angle theorems explored in a far from traditional way!

Author: Barrie Galpin

Tags: Algebra

City Data

Data from 50 cities around the world - all ready to be explored and analysed

Author: Barrie Galpin

Argomento:  Mathematics

Tags: Decimals, Data, Differentiation

Trig Symmetry

A tool to demonstrate that parts of the trig function curves are essentially the same.

Author: Barrie Galpin

Argomento:  Mathematics

Tags: Trigonometry

Turn, turn, turn, turn

UPDATED. Four rotations of 90° and you get back to where you started .... always?

Author: Barrie Galpin

Argomento:  Mathematics

Tags: Transformations

Time of Death

Collect temperature data and use an exponential model to estimate time of death.

Author: Barrie Galpin

Argomento:  Mathematics

Tags: Physics

Hurricane force

Investigate data from weather stations including wind speeds in different units

Author: Barrie Galpin

Argomento:  Mathematics

Tags: Environment, Exponential, Measures, STEM

Ice and Salt

Use a temperature probe to investigate the effect of adding salt to a water/ice mixture.

Author: Barrie Galpin

Tags: Physics

Air Resistance

Motion data from weighted cones shows air resistance varies as the square of terminal speed

Author: Barrie Galpin

Tags: Physics

Exploring our Solar System

Detailed data for the properties of the planets with 10 pages of questions.

Author: Barrie Galpin

Tags: Data, STEM, Physics

Premier League Goals

Compare frequencies of goals scored per team per match and resulting scorelines.

Author: Barrie Galpin

Tags: Data, Frequency, Sport, Probability

Centres of a Triangle

Construct some of the centres of a triangle and investigate relationships between them, discovering the Euler Line

Author: Barrie Galpin

Tags: Circles, Zeros, Geometry, T3

Averages with dice

Simulate the throws of one or more dice, predict and tabulate outcomes. Plot the data and obtain averages and the range.

Author: Barrie Galpin

Tags: Averages, Expected frequency, Randomness, Probability

Circle Theorems

Explore five circle theorems by moving lines and points around the TI-Nspire screen.

Author: Barrie Galpin

Tags: Temperature

Reflection

Experience reflection dynamically: relationships between the object, the image and the position and orientation of the mirror.

Author: Barrie Galpin

Tags: Reflection

Relative Frequency

Animation comparing absolute and relative frequencies for simulated dice throws and coin tosses

Author: Barrie Galpin

Tags: Frequency, Probability

Power and Exponential Laws

Modelling situations where experimental data suggests there may be either power or exponential functions

Author: Barrie Galpin

Tags: Exponential, Powers and roots, Scattergraphs, Logarithms, Modelling

Straight-line Graphs

Introducing the connection between linear equations and straight-line graphs

Author: Barrie Galpin

Tags: Linear, Patterns, Functions

Similar Shapes

A dynamic approach to enlargement and similarity

Author: Barrie Galpin

Triangle construction

When constructing triangles, why is there only one possibility?

Author: Barrie Galpin

Tags: Fractions

Crop Circles

Geometrical constructions and patterns in the context of crop circles

Author: Barrie Galpin

Tags: Polygons, Triangle, Symmetry