Magical Bundles of Numbers

The other day, a colleague on a mailing list asked for some background info on EPS graphic files. It seems her school wanted something professionally printed and the printer asked that the artwork be provided in EPS format. Thanks to the ubiquity of the web, we are mostly only exposed to the more common web graphic formats like JPEG and GIF files these days, so some of the more exotic types like EPS are not as well understood as they could be. For what it’s worth, here is my reply…

Ah, EPS files! A thing of beauty and a joy forever!

For anyone who works with graphics Encapsulated Post Script, or EPS files, are the holy grail of image formats. They are the ideal format for storing original artwork, although they are generally pretty useless for actually applying that artwork to a final format. By that I mean that most final applications for graphics, whether it be the web or printed documents, cannot use EPS files natively. But for a way of storing the original artwork, EPS files reign supreme. Here’s why…

Imagine you have a school logo image that gets used for a variety of purposes. It gets printed on school letterheads and business cards in very small sizes, reproduced on school coffeemugs and Tshirts at slightly larger sizes, and even gets blown up to very large sizes to make a banner for outside the school on open day. To get an image that looks good at all these different sizes, the artwork needs to be at different resolutions… A small jpeg file suitable for printing on the letterhead will look awful when stretched to be a large image for a banner for example. What you need is a way of creating these images that is resolution independent, so you can have the right resolution for the right situation.

That’s where EPS files come in. In an EPS, all the shapes and lines in the image are described mathematically. A very simple example would be a circle… Imagine you had a circle in an image, all you’d really need is the formula for creating a circle and the specific information about that particular circle. Mathematically, a big circle is exactly the same as a little circle but with different values for the key factors of radius, colour, edge thickness, etc… In an EPS file, this technique of using functions to describe objects is how the shapes are defined. This is very different to a JPEG or GIF, where shapes are created by a mosaic of pixels placed next to each other, a technique known as Bitmapping. Using bitmapping, a small circle and a big circle are two totally different patterns of bitmaps, which is why small graphics look so awful when they get stretched to be larger… You cannot just create new pixels from out of thin air to fill the gaps… the original pixels need to stretch, making the image look blocky and rather awful.

So in an EPS, the basic mathematical descriptions of the shapes that make up the image (called vectors) are embedded into the file using a language called PostScript. Postscript is a language that many laser printers use to describe how an image will be printed… When you print to a postscript-enabled laser printer, your printed image (whether that be text or pictures) is bundled up as little mathematical descriptions and sent to the printer where it is decoded back into the images and then printed. EPS files are that bundle of mathematical descriptions which define the image, but instead of being decoded by a printer they are just stored as a file.

Here’s the good bit… When you open an EPS file (which is vector based) in a graphics editing program like Photoshop (which is bitmap based), it asks you what size and resolution you’d like the image to be created at. Once you tell it the desired size and resolution, the EPS is then converted to a bitmap using the exact values you specify. This is the real magic of an EPS file… EPS gives you a single vector-based, size and resolution-independent file that unpacks to a bitmap-based, size and resolution-specific file at whatever specs you like. No wonder people who work in the printing industry love ‘em! They can be all things to all people. A single EPS file can be used to convert the image into whatever size and quality is required, be it the tiny artwork for the business card or the huge artwork for banner.

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The Plague of Plagiarism

Something that has been bothering me a lot lately are the constant wails I hear from some teachers about plagiarism. Obviously, plagiarism is a bad thing and we need to help kids learn that it’s not appropriate, but I keep seeing incidences of plagiarism lately that I find very hard to blame the kids for. One has to wonder that if kids are blatantly copying and pasting large chunks of stuff into their assignments then perhaps we need to think about how we can be smarter as teachers by asking better questions in the first place, and create tasks that are simply not so plagiarisable to start with.

Just to clarify, when I talk about plagiarism I’m referring to the idea of kids copying slabs of information out of textbooks without thought, or of kids copying work directly from their classmates, or of kids using wording and information from books without citing their sources. The issue of citation is a slightly different issue and I’m not so concerned with that one… that’s usually just a matter of educating the kids to acknowledge their sources. It’s the other types of plagiarism that bother me, because I think that we teachers are largely responsible for them.

I once worked for a company that wrote training notes for Microsoft Office applications. We had a set of instructional notes that we developed for Word, and for whatever reason we decided to sell those notes to another training company. Of course, having sold them the rights to our notes we could no longer use them ourselves so we had to rewrite a new set for our own use. Which we did. We took all the screenshots again, and we rewrote the instructions again. But guess what? They were essentially the same training notes. We took out the old screen shots and we replaced them with nearly identical ones. We rewrote the instructions. And the end result was very similar to the ones we sold. Now, some would say that we plagiarised our own notes. We simply reproduced what already existed into a product that looked essentially the same. But when you are dealing with basic, low-level, instructional information, how many different ways can you say it? If the first step in the instructions is to “Click the File Menu and select New…”, then there are only so many ways you can say that. Does that make it plagiarism?

Using the same logic, think about some of the tasks we set for kids. Anytime you set a “research task” where you ask a student to “find out about…” or “research about…” some topic, think about how that “research” might be done in a way that takes the kids beyond just finding out about the information and extend them into ways that they can use and manipulate and be creative with that information. That’s how you avoid plagiarism.

I once overheard a colleague loudly lamenting the fact that a student had plagiarised an assignment. She was quite indignant that a student would simply regurgitate information from a website and transfer that information directly into their assignment. Sure, a few sentences had been changed here and there, but for the most part the student had taken large slabs of text and re-presented that text in her assignment. Other colleagues joined in the witch hunt, Googling sentences out of the text and finding the original online sources. There was much talk about how this student should be punished, and whether they should be given a mark of zero.

The thing is, when I asked to have a look at the question which was set for this task, it turns out the student was essentially asked to “Research one of the following major world religions.” She chose Buddhism. She did the obvious thing, she went to Google, typed in the word Buddhism, and found some information. She then retold that information in the assignment. She used a couple of different websites and chopped a few bits out of one and a few bits out of another, changed a few sentences here and there to glue the bits together in some sort of logical fashion, and there was the assignment. Although you might cry plagiarism, based on the question set for the task the teacher certainly had no real right to accuse the student of not doing what was asked, and on that basis a mark of zero seemed a bit rough to me. Now, while this was a probably a pretty lame attempt at research on the student’s part, I thought it was an even lamer attempt at a question on the teacher’s part. Research Buddhism. How many ways can you answer that? If the goal of the assignment was just to get the student to read about Buddhism (or whatever the topic might have been) and report on it, then mission accomplished. They got exactly what they asked for. Trouble is, they really didn’t ask for much.

Of course, we all know what the teacher really wanted. They wanted the student to really learn about the topic, to engage with it and internalise it and expand their understanding of it. They wanted the student to come away with a deeper understanding of what Buddhism was all about.

But that’s not what they asked.

They asked a simple, mono-dimensional question, and of course they got a simple mono-dimensional answer. An answer where plagiarism was not only to be expected, but was probably the only real way to answer the question.   Without reading about Buddhism in a book and then paraphrasing what they read, what was the teacher expecting?  The best way to “research Buddhism” is to actually become a Buddhist and talk about what it was like, but that’s not likely to happen.  So essentially, this becomes an exercise not in learning about Buddhism, but about seeing who can paraphrase the best.  And what about the kids who “didn’t plagiarise”? What did they do? Did they learn about and internalise and engage with the topic in a deeper way? Or were they just better at rewording what they read? Did they actually learn something, or were they simply better at covering their online tracks?

I say if we want our kids to think more, then we have to get far better at asking good questions. What sort of response would we have gotten to this assignment if, instead of saying “Research one of the following world religions” we had said “If you were to change your current religion, which of the following world religions would you prefer to convert to, and why?” Same basic question. Totally different experience to develop an answer for it. And much less likely to be simply copied from a website.

One person who has done a lot of great work in this area is Jamie Mackenzie. His website over at www.questioning.org has tons of great ideas for developing better questions. Read his stuff to help develop deeper, more relevant questions that not only engage kids in a much more rewarding way, but will help you develop questions that make plagiarism harder to do, and basically negate the need for it in the first place.

The bottom line is that we have to stop blaming our kids when they copy and paste stuff into their assignments. Sure, every school should have a plagiarism policy, and every student should be made aware of the inappropriateness of copying other people’s work. But the buck needs to stop with the questions being asked in the first place. If you ask dumb questions, you’ll get dumb answers. It’s not about having cleverer tools to try and catch out kids who plagiarise. It’s not about coming up with punitive measures for dealing with plagiarism once it happens. We just need to get much, much better at building real thinking exercises for our kids, based on questions that are deeper, richer and more relevant in the first place.

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Spread the Love

You may have heard the story about the penny doublng every day for a month, or the grains of rice on the chessboard. These stories are based on the principle of exponential growth, and exponential growth is a really amazing thing!

You can use the same principle to spread information too. You tell a few, and they tell a few. Those few tell a few, who in turn tell a few more. Pretty soon, many know.

The organisers of the K12 Onlline Conference would like to use this principle to spread the word about the event. As you may know, the conference kicks off on October 8 with David Warlick’s preconference keynote address, delivered like all the other presentations of course… in downloadable digital format. It then has a full 2 weeks of presentations being released at regular intervals between the 15th and the 26th. See the flyer for more details.

To help spread the word, we are passing it along in the form of a meme. Here’s what you’re asked to do… simply create a blog post where you link to the flyer image in this post.

Then, list three reasons to participate based on your experience from last year or, if you didn’t attend last year, write three things you hope to gain from taking part this year. Once you’ve written your 3 things, then tag several others who will do the same thing. After you tag someone in your post, please email them to let them know so they can help spread the word. Oh, and if you really want to help spread the word, why not print yourself a copy of the flyer and leave a few around your school? Or hand them out? Or tell your colleagues at a staff meeting? Or make a mention of it in your school newsletter? Just tell people!

So, for me… 3 reasons to participate based on last year…

  1. It’s a great chance to learn about new things, or to learn about old things but see them in new ways. David Warlick’s “off the rails” example is simple and obvious, but it has really stuck with me from last year’s keynote and I’ve applied it’s principle in many ways over the past year. It’s a very powerful idea that makes a big difference to seeing what is really important in the learning process.
  2. An expanded sense of community. I now know so many more educators all over the world. We communicate and share ideas regularly. We Skype and we Tweet and we share. We have an ongoing conversation, and the learning that comes from that conversation is incredibly powerful.
  3. Last year stimulated many great ideas. Not only in me but in other teachers around me, and some of those teachers went on to do some astounding work with kids and tech. I know much of that stuff would never have happened without the influence of the conference. It was a major trigger.

There are probably other reasons, but that’s enough. So now I’m passing the meme on to these amazing teachers… All Australian and coincidentally all starting with a J.

Jess McCulloch
Jo McLeay
John Pearce
Judy O’Connell
Jason Hando

Spread the love!

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