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Circle Theoremsfree3 January 2011
'Discover and generalise the theorems about angles in circles using dynamic geometry' This activity focusses on the important difference between a particular case and the general case. Using dynamic... more
Skewey Squaresfree2 January 2011
'Discover Pythagoras's theorem by investigating the areas of these Skewey Squares' This is a fantastic investigation full of surprises that really help to understand how mathematical phenomena can be... more
Discovering Pifree2 January 2011
'Give meaning to the existence of Pi by exploring the geometric phenomenon from which it comes' The enigmatic Pi is a fascination for mathematicians, but it can be a mystery to lots of people. Its decimal... more
Spherical Cylindersfree22 December 2010
'What's the relationship between the volume of a sphere and the volume of a cylinder of equal height and diameter enclosing Mr. Potato Head? ' Use the weblink below to investigate the relationship between... more
Adding & Subtracting Negatives TN3 November 2010
The computer gives fast and reliable feedback which is non-judgemental and impartial. The self-checking spreadsheet exploits this well and encourages students to test out and modify their ideas. If... more
Explore Sequences with Excel TN12 June 2009
Using spreadsheets allows for much quicker investigation and as such encourages a focus on the relationship between structure and sequence. Students, particularly those new to using spreadsheets, are... more