median
don steward
mathematics teaching 10 ~ 16

Tuesday, 23 May 2017

intervals of 10

variations on a theme






what is a general rule for the end numbers?

why?

Monday, 22 May 2017

zoom

  • place value, zooming in
  • reversing the question
  • generalising
  • harder generalising
a powerpoint, kind of illustrating the zooming in





Friday, 12 May 2017

half is in the middle




















what do students notice about the results?

why is that?

fraction addition denominators multiples

to start adding fractions it can be helpful if one denominator is a multiple of the other
so that only one denominator needs to be changed

in England such work is offered to 9 to 10 year olds (Y5)











fraction cancelling

powerpoint here





















sometimes, as in question (7), you only part-cancel a fraction in order to find the nth term rule
sometimes, for other fraction sequences, there is a stray fraction that cancels - not part of the general cancelling rule
some features of an overall generalisation are relatively easy to discern
and others aren't (for me anyway)

Wednesday, 3 May 2017

Saturday, 29 April 2017

dividing a fraction by a whole number

a powerpoint is here

four consecutive numbers

developing an idea from the Y6 'mastery' resources at the NCETM site