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Profil : Barrie Galpin


Barrie Galpin

United Kingdom

DEMO Description

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

Autor: Barrie Galpin

Schlagwörter: Angles, Triangle

Connecting Algebra, Geometry and Graphs

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

Autor: Barrie Galpin

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

The Warehouse Problem

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

Autor: Barrie Galpin

Schlagwörter: Modelling

Intersecting Tangents of a Parabola

Construct two tangents to a parabola and investigate the coordinates of their point of intersection.

Autor: Barrie Galpin

Schlagwörter: Quadratic, Simultaneous equations, Reasoning, Coordinate Geometry

Circle Angles

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

Autor: Barrie Galpin

Schlagwörter: Angles, Circle theorems

Diameters of Polygons

Investigate the ratio of perimeter to diameter for regular polygons.

Autor: Barrie Galpin

Schlagwörter: 2D shapes, Perimeter


Generate sequences using term-to-term and sequence to term rules.

Autor: Barrie Galpin

Schlagwörter: Patterns

Transformations of Graphs

Explore transformations of graphs in a dynamic environment.

Autor: Barrie Galpin

Schlagwörter: Functions, Transformations

Heads and Tails

Experimental probability... for better samples make them bigger.
(Navigator activity)

Autor: Barrie Galpin

Schlagwörter: Binomial Distribution, Probability

Light Law

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

Autor: Barrie Galpin

Schlagwörter: Physics, STEM

g by freefall

Use the CBR2 to collect motion data and calculate the acceleration due to gravity.

Autor: Barrie Galpin

Schlagwörter: Physics

Car motion

Use the CBR2 to collect and display motion data for different toy cars.

Autor: Barrie Galpin

Schlagwörter: Physics

Carbon dating

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

Autor: Barrie Galpin

Schlagwörter: Physics, Exponential, Functions, Differential equations

What's in your breakfast?

Inequalities and data handling in the context of the nutritional content of breakfast cereals

Autor: Barrie Galpin

Schlagwörter: STEM, Inequalities

Reaction times

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

Autor: Barrie Galpin

Schlagwörter: STEM, Biology

Patterns to Graphs

Experience the connection between a number pattern and its graph

Autor: Barrie Galpin

Schlagwörter: Linear, Patterns, Functions

A number plus its square

How many ways to solve problems such as "a number plus its square equals 16"?

Autor: Barrie Galpin

Schlagwörter: Various topics

Barn and pen problem

A simple version of the maximum-area problem for younger students

Autor: Barrie Galpin

Schlagwörter: Area

Perfect Pitch

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

Autor: Barrie Galpin

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

The sheep-pen problem

Recognise a quadratic in a realistic context and solve an optimisation problem

Autor: Barrie Galpin

Schlagwörter: Quadratic, Perimeter, Area, Algebra