The clock face - Panel discussion: Can the American Mind ...

>>> My mental model for arithmetic is a clock face,
>
> The clock face is an interesting programming challenge for languages
> like etoys, Scratch and Game Maker which provide good graphics
> support. It provides a good context for problem solving and exploring
> trigonometry. See a clock at
> http://www.schoolgamemaker.rupert.id.au/morethan.htm programmed with
> Game Maker.
>
> It is worth considering what kids would gain from such an exercise and
> how the features of the various languages would affect the learning.
> How do the languages compare for depth of learning and ease of use
> (engagement)? It is only through considering these questions that
> Squeak can be made as good as it can be.
>
> Anybody want to create a clock in etoys or Scratch for comparison?
> Here is the Game Maker code
> draw_circle(200,200,130,true)
>
> x2=200+100*sin(2*pi*current_second/60)
>
> y2=200-100*cos(2*pi*current_second/60)
>
> draw_line(200,200,x2,y2)
>
> x2=200+100*sin(2*pi*current_minute/60)
>
> y2=200-100*cos(2*pi*current_minute/60)
>
> draw_line(200,200,x2,y2)
>
> x2=200+50*sin(2*pi*(current_hour+current_minute/60)/12)
>
> y2=200-50*cos(2*pi*(current_hour+current_minute/60)/12)
>
> draw_line(200,200,x2,y2)
>
> for(i=0; i<12; i+=1)
>
> {
>
> x1=200+110*sin(2*pi*(i)/12)
>
> y1=200-110*cos(2*pi*(i)/12)
>
> x2=200+125*sin(2*pi*(i)/12)
>
> y2=200-125*cos(2*pi*(i)/12)
>
> draw_line(x1,y1,x2,y2)
>
> }
>
>
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