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Circular Circuitry
16 to 18
What will happen when you switch on these circular circuits?
problem
Perfect Eclipse
14 to 16
Use trigonometry to determine whether solar eclipses on earth can be perfect.
problem
Folded Number Line
7 to 11
When I fold a 0-20 number line, I end up with 'stacks' of numbers on top of each other. These challenges involve varying the length of the number line and investigating the 'stack totals'.
problem
Painted Faces
7 to 11
Imagine a 3 by 3 by 3 cube made of 9 small cubes. Each face of the large cube is painted a different colour. How many small cubes will have two painted faces? Where are they?
problem
Robert's Spreadsheet
14 to 16
Robert noticed some interesting patterns when he highlighted square
numbers in a spreadsheet. Can you prove that the patterns will
continue?
problem
Folding Squares
14 to 16
The diagonal of a square intersects the line joining one of the unused corners to the midpoint of the opposite side. What do you notice about the line segments produced?
article
Primary Proof?
Proof does have a place in Primary mathematics classrooms, we just need to be clear about what we mean by proof at this level.
