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GeoGebra is a dynamic mathematics software for schools that joins geometry, algebra and calculus.
Desmos Graph functions, plot tables of data, evaluate equations, explore transformations, and much more for free!

On the one hand, GeoGebra and Desmos are interactive geometry systems. You can do constructions with points, vectors, segments, lines, conic sections as well as functions and change them dynamically afterwards. On the other hand, equations and coordinates can be entered directly.

GeoGebra can be downloaded for free and you do not need to obtain administration rights - To access the website and download the software - I suggest you go to CNET - Click here

Desmos can be accessed online  - Click here

Both environments have lots of free resources already produced by teachers

Geogebra -
Dynamic geometry, algebra and calculus package.
Geogebra Resources - Click here
Free pool of dynamic worksheets developed by teachers - Best of in centre column.
GeoGebraForum -
Supportive and enthusiastic user community.
International GeoGebra Institute -
Offers free training for teachers
Issues GeoGebra certification
Conducts reasearch.
UK Contact: Zsolt Lavicza -  

: Warning: Select the Save Option and then extract the files.  You may find it necessary to open the GeoGebra program and then open the file from the top menu rather than double clicking the file to open it

The following were produced by Kevin Brinkley, Mark Dawes, Charlie Dawson, Mark Greenaway, Jack Keeler, Zsolt Lavicza and Matt Sims.

For an overview of the toolbar used in GeoGebra - Click here

Tutorial Files - These comprise a PowerPoint Tutorial enabling teacher or student to generate a GeoGebra file - [they were produced thanks to partnership funding provided by Suffolk Advisory Service as were many of the ready to use files]
Circle Theorems Enlargement Rotation Reflection
Equations of Lines Loci Mixed Transformations Transformation of Curves
Reflectional Symmetry      

Files Ready to Use - These comprise GeoGebra files that can be used in the classroom in their present format

Multiplying Fractions  


Optimisation Solution
Speed-Time Graph Distance-Time Graph Equation of a Circle
Numerical Integration Perpendicular Lines Simultaneous Equations
Linear & Quadratic
Angle Rules    
Alternate Angles Angles around a Point Corresponding Angles Interior Angles
Exterior Angles in a Triangle Exterior Angles in a Square Exterior Angles in a Pentagon Exterior Angles in a Polygon
Angles on a Straight Line      
Circle Theorems    
Circle Theorem 1 Circle Theorem 2 Circle Theorem 3 Circle Theorem 4
Circle Theorem 5 Circle Theorem 6 Circle Theorem 7 Intersecting Chord Lengths (Inside)
Area & Pythagoras    
Area of a Rectangle Area of a Kite Area of a Triangle Area of a Trapezium
Tilted Square Pythagoras    
Reflectional Symmetry    
Reflection Face Reflection Man 1 Reflection Man 2  
Reflections Translations Rotation  
Bisecting Sides of a Triangle Midpoint of a Line Midpoints of Sides of Quadrilaterals What is the Shape