Subbu,
On Friday 09 April 2010 09:18:55 pm Bert Freudenberg wrote:
> On 09.04.2010, at 17:37, K. K. Subramaniam wrote:
> > I have seen kids drag turnBy:5 tiles multiple times into a script, thenFrom an adult's PoV, yes. From a kid's PoV, no. That is the way some kids pick
> > try to use the repeat tile before they stumble on the fact that repeat 5
> > turnBy: 5 is same as turnBy: 25. Understanding angular magnitudes seems
> > to take more 'cooking' time than that for linear magnitudes. Is it
> > because one has to run one's eye over 'empty space' to gage angles? I
> > don't know.
>
> That's more of a mis-use than use, right?
up numeracy. See Deborah case study in page 118 of Mindstorms.
> > When placing elements along a circle, it is easier to use repeat tileRepetition occurs in many places including graphics. Visual thinkers tend to
> > than to dup individual tiles.
> >
> > self heading: 0.
> > 12 timesRepeat: [ self dosomething. self turnBy: 30 ].
> >
> > or
> >
> > self heading: 0.
> > 60 timesRepeat: [ self dosomething. self turnBy: 6 ].
>
> This sounds pretty equivalent in spirit to turtle graphics to me (even if
> you're placing objects and not just marks).
use graphics heavily but think of weavers, potters, musicians or dancers. See
Ron Eglash's research in http://csdt.rpi.edu for its ties into many cultures
around the world.
Thanks. Repeat tile has an important role to play in developing numeracy. It
> In any case the discussion showed repeat is too useful to remove or even to
> hide. But moving it to the pen category seems like win-win to me. You
> still can use it for anything else but it would encourage to use it with
> pen drawings.
helps make the connection between 2+2+2+2 and 2x4.
Subbu
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