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Profile Of : Barrie Galpin


Barrie Galpin

United Kingdom



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Content (70) |

Hurricane force

Auteur: Barrie Galpin

Onderwerp:  Wiskunde

Tags: Milieu, Exponentieel, Maten, STEM

Investigate data from weather stations including wind speeds in different units

The Sine Rule

Auteur: Barrie Galpin

Tags: Trigonometrie

Investigate ratios in triangles that are not right-angled

Shoe Sizes with Box Plots

Auteur: Barrie Galpin

Tags: Data, Box plots, Tijdreeksen

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


Auteur: Barrie Galpin

Tags: Omtrek

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

Ice and Salt

Auteur: Barrie Galpin

Tags: Fysica

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

Exploring our Solar System

Auteur: Barrie Galpin

Tags: Data, STEM, Fysica

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

Mediators of Triangles

Auteur: Barrie Galpin

Tags: Meetkunde

Investigate where mediators of different triangles meet

How many squares?

Auteur: Barrie Galpin

Tags: Circels, Wiskundig denken

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


Auteur: Barrie Galpin

Tags: Coördinaatsystemen

An introduction to the use of coordinates for younger students


Auteur: Barrie Galpin

Tags: Hoeken, Driehoek

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

Connecting Algebra, Geometry and Graphs

Auteur: Barrie Galpin

Tags: Lineair, Kwadratisch, 2D vormen, Letters en symbolen

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

The Warehouse Problem

Auteur: Barrie Galpin

Tags: Modelleren

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

Circle Angles

Auteur: Barrie Galpin

Tags: Hoeken, Cirkelstellingen

Seven activities in which students investigate angles in circles using basic geometric constructions.

Transformations of Graphs

Auteur: Barrie Galpin

Tags: Functies, Transformaties

Explore transformations of graphs in a dynamic environment.

Light Law

Auteur: Barrie Galpin

Tags: Fysica, STEM

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

Carbon dating

Auteur: Barrie Galpin

Tags: Fysica, Exponentieel, Functies, Differentiaalvergelijkingen

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

Reaction times

Auteur: Barrie Galpin

Tags: STEM, Biologie

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

Perfect Pitch

Auteur: Barrie Galpin

Tags: Exponentieel, Patronen, STEM, Meetkundige reeks, Fysica, Meetkundige plaatsen

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

Dimensions of a Circle

Auteur: Barrie Galpin

Tags: Omtrek, Oppervlakte, Circels

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


Auteur: Barrie Galpin

Tags: Lineair, Patronen

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