Investigating Circumference and Diameter (Discovering Pi)

Investigating Circumference and Diameter (Discovering Pi)

An interactive geogebra applet that enables students to investigate the relationship between the diameter and circumference by measuring the diameter (drag the blue cross), unrolling the circle and measuring the circumference (drag the red cross). Students can zoom in to inprove the estimation of pi. Please note, you need to install geogebra (or upload onto geogebra site for use without install).
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Dicovering Pythagoras

Dicovering Pythagoras

An interactive geogebra applet that allows the teacher (or students on ipads/in computer room if uploaded onto geogebra website) to create right angle triangles using a set number of standard squares. Students can record their trials and try to spot any relationships between the size of the squares that work. An accompanying worksheet and lesson plan to match. You need geogebra installed (free).
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Probability tree generator

Probability tree generator

A dynamic and interactive probability tree structure generator. Generate questions and create the corresponding tree so students can practice interpreting questions. This is a geogebra applet so you need the application installed or I could email you the link so you can use within a web browser.
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Simultaneous equation creator and solver

Simultaneous equation creator and solver

An interactive geogebra applet that creates and solves two sets of linear simultaneous equations dynamically. Drag the vertical slider to reveal the working. Also shows the graphical significance of the solution in an additional window. You must have geogebra installed on your machine.
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Volume of revolution

Volume of revolution

An interactive geogebra applet that allows the teacher to plot any function and dynamically reveal the volume of revolution around the x-axis. It calculated the volume also.
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Area of a Parallelogram

Area of a Parallelogram

Models how to find the area of a parallelogram by linking it to the area of a rectangle. Fully dynamic and interactive examples.
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Simultaneous equation interactive solving powerpoint

Simultaneous equation interactive solving powerpoint

Dynamically change the problems in this PowerPoint using the up/down buttons. Click on the +/- symbol to add or subtract the equations and click on the green area to see the equations combine. Reveal the solutions by clicking the covers.
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Creating designs with rotation symmetry

Creating designs with rotation symmetry

An interactive PowerPoint and worksheets that model how to complete/create patterns with rotation symmetry using tracing paper. Using the navigation buttons...1)Select the example, 2)Show the tracing paper, 3)Trace the design, 4)Rotate the tracing paper to find the missing parts of the design.
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Prime Factorisation

Prime Factorisation

A set of interactive examples that model how to create a prime factorisation using factor trees. Click on the number in the tree to shown the next level/branches and click the empty branches to reveal the factors. Once the tree have been fully revealed, click on the end branches to show the prime factorisation.
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Identifying Rotation Symmetry

Identifying Rotation Symmetry

A fully interactive presentation that models how to identify and check for rotation symmetry using tracing paper. Use the navigation buttons to....1)Navigate throught the examples, 2)Select tracing paper 3)Trace 4) Rotate.
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Lowest common multiple and highest common factor (LCM and HCF)

Lowest common multiple and highest common factor (LCM and HCF)

An interactive PowerPoint that uses prime factor trees and Venn diagrams to model how to calculate the LCM and HCF. Uncover the end branches by clicking on the covers, click on the end branches to select the prime factors, show the Venn diagram and click on the selected factors to place them in the Venn diagram.
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Expanding two linear brackets

Expanding two linear brackets

An interactive PowerPoint that uses partitioning (as with numerical multiplication) to expand the product of two linear brackets. Also includes some simple factorising where you can drag-and-drop the correct factors (must enable macros). Click on show/hide to reveal the grid, click on the factors in the brackets in input these into the grid and unhide the expansion by clicking on the covers.
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Area of a Trapezium

Area of a Trapezium

An interactive PowerPoint that models how to calculate the area of a trapezium by dynamically converting it into a parallelogram.
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Adding and subtracting fractions visually

Adding and subtracting fractions visually

An interactive and dynamic PowerPoint that models how to add and subtract fractions using pictures. Use the 'fraction' buttons to show the visual representation of each fraction and click on each sector to shade it in. Click on 'add/subtract' once to reveal the common denominator shape and again to visually see the fractions adding together.
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Constructing triangles SAS

Constructing triangles SAS

A PowerPoint modelling how to construct a triangle given two side lengths and one angle. Includes non-unique triangles (SSA).
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Solving by iteration (trial and improvement). Fully dynamic and interactive.

Solving by iteration (trial and improvement). Fully dynamic and interactive.

An interactive PowerPoint to model solving quadratic and cubic equations using trial and improvement. Use the +/- buttons on each row to change the input and click on the x number shown to watch it dynamically substitute. Click on the blank parts of the table to reveal the substituted parts evaluated. Using the +/- button on the next row, modify the input and substitute again by clicking on the number shown and repeat the process. If more table is needed, click clear.
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