Re: [Origami] Which of these two options to teach the ?s?method?

[Karen Reeds]

>
>   [Origami] Which of these two options to teach the
> ?s?method?
>
> On Wed, May 9, 2018 at 7:25 AM, Sy Chen  wrote:
>
> > Have you tried parallel line approach based on Thales Intercept theorem?
> > Usually you make a template by binary divisions (4, 8, 16, ...) on
> another
> > paper. Regular print paper will do. The 3 division method is illustrated
> > here:
> >
> > https://photos.app.goo.gl/L7LY4kRAYfPa5z3D8
>


If you're not fussy and the size of the paper isn't at issue, there's the
brute-force method: divide into parallel 4ths and cut off the extra.

Karen

Karen Reeds, co-ringleader
Princeton Public Library Origami Group
Affiliate of Origami USA, http://origamiusa.org/
We usually meet 2nd Wednesday of the month, 6:30-8pm, 1st floor Quiet Room.
Free!
We provide paper! All welcome! (Kids under 8, please bring a grown-up.)
Princeton Public Library info:  609.924.9529
https://princetonlibrary.org/

Celebrating 12 years of paperfolding in Princeton!
Our next meetings:  Wednesday, June 13, 2018
July 11, 2018

https://princetonlibrary.org/2012/05/01/princeton-rich-treasure/

Re: [Origami] Which of these two options to teach the “s”method?

[Mary E. Palmeri]

On Wed, May 9, 2018 at 7:25 AM, Sy Chen  wrote:

> Have you tried parallel line approach based on Thales Intercept theorem?
> Usually you make a template by binary divisions (4, 8, 16, ...) on another
> paper. Regular print paper will do. The 3 division method is illustrated
> here:
>
> https://photos.app.goo.gl/L7LY4kRAYfPa5z3D8
>

​This approach is great!  I've used it often when teaching workshops​

​and it is very popular with my students.  It is especially helpful for
dividing into 5ths (or 7ths) since they are not as easy to guesstimate as
thirds with the 'S' system.​
Mary Ellen in AZ, usa

Re: [Origami] Which of these two options to teach the “s”method?

[Sy Chen]

Have you tried parallel line approach based on Thales Intercept theorem?
Usually you make a template by binary divisions (4, 8, 16, ...) on another
paper. Regular print paper will do. The 3 division method is illustrated
here:

https://photos.app.goo.gl/L7LY4kRAYfPa5z3D8

You can get any number of divisions without any pre-creasing. I believe it
is easier than S-method.

Happy folding!

Sy

Re: [Origami] Which of these two options to teach the "s" method for dividing into thirds?

[David Whitbeck]

I prefer to roll and check without pinching at either edge, make
adjustments and then pinch... in the center to ensure that it matches at
both edges and then fold outward from the center.  If you pinch at either
edge and fold in you run the risk of the creases not matching perfectly at
the center.

I understand why you like folding in thirds using that method, but I don't
that it is ideal from a teaching perspective.  The other method gives rise
to a teachable moment: the introduction of Haga's first theorem.  And the
roll method or "s" method is applicable in only that one context, Haga's
theorem allows for divisions into Nths and is thus more generalized and
robust even if it might introduce extraneous pinching and folding.

In my two week origami course I have not taught anything that required
divisions by thirds but I do teach Haga's theorems.

Re: [Origami] Which of these two options to teach the "s" method fordividing into thirds?

[Mizu-randa]

-Original Message- 
From: Gerardo @neorigami.com

Sent: 07 May, 2018 16:09

I like this method, it doesn't leave unwanted creases on the paper. Now, 
my

experience is that when I teach it to relative origami beginners, some
struggle a little bit with it.

If you try to do the S-method against the grain it's hard to get it right. 
Maybe these people won't be struggling so much after they've rotated the 
paper 90 degrees.


Origards,
Miranda