Skip navigation

Profile Of : Barrie Galpin


Barrie Galpin

United Kingdom

DEMO Description

Proin faucibus arcu quis ante. Mauris sollicitudin fermentum libero. Maecenas vestibulum mollis diam. Fusce fermentum. Donec posuere vulputate arcu.

Mauris sollicitudin fermentum libero. Vivamus euismod mauris. Etiam feugiat lorem non metus. Nam commodo suscipit quam. Nullam accumsan lorem in dui.

Antal resurser (70) |


Author: Barrie Galpin

Labels: Circumference

Explore the relationship between radius, diameter and circumference of circles.

Ice and Salt

Author: Barrie Galpin

Labels: Physics

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

Exploring our Solar System

Author: Barrie Galpin

Labels: Data, STEM, Physics

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

Mediators of Triangles

Author: Barrie Galpin

Labels: Geometry

Investigate where mediators of different triangles meet

Transformations of Graphs

Author: Barrie Galpin

Labels: Functions, Transformations

Explore transformations of graphs in a dynamic environment.

Light Law

Author: Barrie Galpin

Labels: Physics, STEM

Use a light probe to explore an example of an inverse square law

Perfect Pitch

Author: Barrie Galpin

Labels: Exponential, Patterns, STEM, Geometric series, Physics, Loci

Look for connections and patterns in the frequencies and wavelengths of sequences of musical notes

Dimensions of a Circle

Author: Barrie Galpin

Labels: Circumference, Area, Circles

Derive the formulae for the circumference and area of a circle using multiple representations.

Carbon dating

Author: Barrie Galpin

Labels: Physics, Exponential, Functions, Differential equations

Estimate the age of a skeleton and discover exponential functions while investigating radioactive decay.

Reaction times

Author: Barrie Galpin

Labels: STEM, Biology

Pose a question, set up an experiment and analyse your results using TI-Nspire.


Author: Barrie Galpin

Labels: Linear, Patterns

Recording matchstick patterns leads to linear functions. (Contains video tutorial)

Optimizing the sheep pen

Author: Barrie Galpin

Labels: Various topics, Circle theorems

Discussion of seven different approaches to an optimization problem

The Sine Rule

Author: Barrie Galpin

Labels: Trigonometry

Investigate ratios in triangles that are not right-angled

Shoe Sizes with Box Plots

Author: Barrie Galpin

Labels: Data, Box plots, Time series

Introducing boxplots and using them to compare very large data sets.

Hurricane force

Author: Barrie Galpin

Område:  Mathematics

Labels: Environment, Exponential, Measures, STEM

Investigate data from weather stations including wind speeds in different units

How many squares?

Author: Barrie Galpin

Labels: Circles, Mathematical thinking

Encourages a systematic approach when searching for solutions. (Works well with TI-Nspire Navigator)


Author: Barrie Galpin

Labels: Coordinate systems

An introduction to the use of coordinates for younger students


Author: Barrie Galpin

Labels: Angles, Triangle

An introduction to the angle properties of triangles and their construction.

Connecting Algebra, Geometry and Graphs

Author: Barrie Galpin

Labels: Linear, Quadratic, 2D shapes, Letters and symbols

Move from words to symbols, to geometric representations, to plotted points and finally to graphs.

The Warehouse Problem

Author: Barrie Galpin

Labels: Modelling

Where to position a warehouse in order to minimise travelling distance to the three stores it serves?