Stop saying "Just add zeros"!
I wish primary school teachers would stop teaching students that you just add zeros when multiplying by multiples of 10. It often leads...
Using only one hand?
I have noticed this year that very curiously many young students are doing maths with one hand on the side of their seat while the other...
Not wrong, and yet not the best use of language for conceptual understanding
Area and Perimeter It is curious that so many students when asked about perimeter and area say that “perimeter is the outside” and “area...
Quick tests for Divisibility
Number 2 If the number is even it is always divisible by 2. Number 3 If the sum of the digits of a number is divisible by 3 then the...
Complex Numbers on the Graphics Calculators
Level 3 - NCEA - Complex Numbers - You have to show your working on your exam paper but here is how you can quickly check your answer...
But you don't count zero!
It is a curious thing that several students this year (two Year 8 and one Year 11 and all from different schools) have told me that "you...
The Fraction Line
It is amazing how many students don't know this.......A key concept about fractions (as students get past halves, thirds and quarters) is...