Talking Teaching

January 10, 2012

one reason many don’t ‘get’ science

Filed under: education, science teaching — Tags: , , — alison @ 9:38 pm

This is something a bit different – those of you who might have visited my ‘other’ blog will know that from time to time I write about pseudoscience, & along with this express concern about why acceptance of ‘woo’ is relatively widespread. This post takes up on that, but I’m mirroring it here as it is relevant to science education (& I hope may generate some fruitful discussion here :-)

Over at this post by Seth Mnookin** in the new HuffPo science section (like Orac I will be rather interested to see how this section pans out), a commenter with the ‘nym Seeking Clarity remarked:

What our mainstream science education curricula apparently fails to adequately teach is why the process of science tends to produce information of relatively high reliability and why this process is such useful compensation for human limitations.

We are instead taught to recite the requisite repertoire of science fact and vocabulary that may be useful to science majors but which (divorced from its epistemological context) is experienced by average students as irrelevant to their own lives.

As a result, the findings of science are seen as one of any number of engines of opinion. The public often misses the role of carefully and collaboratively vetted empirical corroboration as a basis of confidence.

Therefore the relative tentativeness, incompleteness, and internal controversies that characterise the products and the community of science can be mistaken for weakness in contrast to those persons who unhesitatingly and appealingly claim to have access to conclusive truths.

I’ve reproduced the comment here as it’s very relevant to discussions I’ve had with colleagues & fellow science bloggers about the voluminous quantities of pseudoscience circulating on the internet & also available through the media (some of the latter masquerades as ‘entertainment’ but some - Ancient Aliens for example – is presented with a seemingly straight face). There seems to be a huge demand for this sort of stuff, as witnessed by the number of websites offering up kitty-litter as a cure-all (not that they come out & call zeolite ‘kitty-litter’), or the‘miracle mineral supplement’ (knock back bleach & it will cure your ills), or detox foot-pads, or… the supply seems endless, & that’s not even counting the more ‘mainstream’ things like homeopathy.

People do tend to seek certainty in their lives, & as the comment above notes, scientists simply can’t give absolute certainty. But that’s often not understood, & it may well make the ‘alternatives’ seem that much more attractive. Hopefully the implementation of the 2007 science curriculum will help to redress that, at least with current & future students. But at the same time we do need to address the sheer volume of information (aka facts) that students must learn; in my opinion that discussion is long overdue!

 

** which is an excellent commentary  on the importance of & need for vaccination – & for responsible science journalism.

May 2, 2011

on academic honesty

I’m marking at the moment (essays & dissertations) and also (when I need a break) reading James Lang’s book On Course: a week-by-week guide to your first semester of college teaching. (Yes, I know I’ve been teaching for yonks, but I know there’s always something new for me to learn & also it’s nice to look at possible resources that I can recommend to others.) Today I read his chapter for week 9, Academic Honesty.

Now, marking first-year essays for a class of 200 takes rather a long time, not least because the tutor & I tend to write reasonably extensive commentaries on each one. We’ve already given feedback to the whole class on what you could regard as ‘general’ issues: following formatting rules, remembering to cite & reference properly, reminding them that the marking rubric is provided for a reason (sigh!)… This is easy to do because the same things tend to crop up each year, even though we take care to work through them in tutorials well ahead of submission date. But the students still need to know what’s good, & what’s not, about the content of their work; hence the individual comments.

However, it used to take us longer to mark, because as well as the outright marking we’d also be checking for evidence of plagiarism – that is, when someone presents the words and ideas of others as their own. It’s often not that hard to pick up (clues like changes in word pattern, accuracy of grammar or punctuation, or even changes in font, for goodness’ sake!), but we were then having to tediously google each suspect phrase in an attempt to confirm or deny our suspicions before raising them with the students concerned. And believe me, that takes time! Up to 30 minutes, for a particularly questionable piece of work.

What’s changed? Many things. First up, we use TurnItIn & electronic submission of essays. More as a teaching tool than a punitive one: the system generates a ‘similarity’ report that highlights phrases, sentences, or (regrettably) whole paragraphs that are not original but can be traced to a journal article, book chapter, or work previously submitted by another student. So we can sit down with a student & go through the report with them, & talk about what’s happened before making a call on whether it needs to be Taken Further. But I’ve also got some TII reports with all identifying details removed, that we can use in tuts at the start of the semester as the basis of discussions about what academic honesty is, & why it’s important. (It does seem to work, too – before we made the decision to use TII, between 10 & 20% of those first-year essays would show evidence of plagiarism, & in about 5% it would be on a seriously grand scale. These days – well, this year it would be about 5% all up – but the confounding factor there is of course that we’ve made a conscious effort to formalise a lot of other processes as well.)

And I do believe it’s really, really important to have that discussion with students. It’s all very well to stand up the front of a lecture class & say, ‘academic honesty, blah blah blah,’ before moving on to that day’s ‘real’ business, but it’s highly unlikely that many students will take much out of that. Too often, I think, teaching staff can assume that the students will pick all this up by osmosis, and  it just doesn’t happen that way.They need to talk about it, to fit the concept in to their existing framework of ideas about the purpose & function of their studies.

They also need to practice the relevant skills (something that comes through again & again in the AAAS’s Vision & change report). So we give practice (in tuts & lab classes) on paraphrasing, citing, and referencing sources of information. Sometimes this generates some really interesting & valuable discussions on quite different issues. And of course, they need to recognise just why the concept of academic honesty is so important – more interesting discussions can arise from this. Some of that discussion focuses on why internet plagiarism is just as serious as any other form – and lecturers have to give clear instructions that this is so; otherwise it’s a problem that will only get worse, given how easy it is to cut-n-paste a bit from here & a bit from there & weave it together into a whole. Lang notes that in 1999, 10% of US students surveyed admitted to this form of plagiarism, but by 2005 this was up to almost 40% – and “a majority of students (77%) believe[d] that such cheating is not a very serious issue” (Lang, 2008).

But there are other steps that lecturers can put in place to reduce the likelihood of students deliberately cheating with coursework – I’m focusing on plagiarism here, but of course taking notes into exams, or storing information in electronic devices also come under this heading - and I was reminded of some of these when reading Lang’s book.  (Incidentally, he gives some quite alarming statistics about the incidence of self-reported cheating by US students: some studies found up to 50% of students saying that they’d done this at least once in the previous year. And that includes Masters & PhD students.)

An obvious step is to use different assessment items each year. Sounds like a no-brainer, but I suspect that for many (all too many) papers the questions used in tests and exams don’t change much between years. But – especially if test papers are returned (& why shouldn’t they be? Don’t we want students to be able to see where they went wrong?) – word probably gets around fairly quickly. Lang tells the somewhat alarming tale of a college fraternity with a filing cabinet full of previous tests & assignments, for its members’ use… Which is why I write new questions for that essay assignment, every year, & try hard to vary test & exam questions as much as possible. It can be a bit fiddly but hey – at least I’m not reading the same answers to the same questions, over & over & over!

Lang also comments that having multiple assessment items can also work against the tendency to cheat. This is because it reduces the proportion of the grade hanging on any one assessment item, and hence the pressure to do really really well in that item by any means possible. Having different forms of assessment items also helps, as it gives students more than one means of demonstrating their skills & knowledge. (Hence these days we’re using theory tests, lab mastery tests, the essay, on-line self-paced tutorials, plus an exam.)

I found this comment interesting because I often hear that we ‘over-assess’ our students, & indeed, that may be so if we are simply assessing for assessment’s sake. But if – as it should be – the focus of assessment is guiding student learning, and students understand what we’re doing & why, then perhaps the ‘over-assessment’ argument loses some of its force.

James M. Lang (2008) On Course: a week-by-week guide to your first semester of college teaching. Harvard University Press. ISBN 978-0-674-02806-7

June 8, 2010

About Paulo Freire

Filed under: education, university — Tags: , , , — kubke @ 5:51 pm

As part of the Postgraduate Certificate where I am a student, I was to give a 10 minute lecture on one theory of teaching. A list of ‘candidate’ theories were provided, and to my surprise Paulo Freire‘s ‘Pedagogy of the Opressed‘ was in the list.

Well, that was quite a surprise.

I had first come across Paulo Freire’s orginal book about over twenty years ago, when I read it in the context of literacy programmes in Latin America. I would not have, then and now, predicted that his ideas would ever make it to a rather mainstream reading list. So, of course, I thought it would be fun to read him once again.

I don’t think I was aware how much I had internalised Freire, and how much of the way that I think about teaching is inspired by that original reading. It was indeed an interesting excercise. Especially because this time around I read his book while thinking how (or if) his ideas could be put in place in tertiary education given the real life limitations of the current tertiary system (like the large size of the classes).

In any case, this lecture also gave me the opportunity to give Prezi a go. First time user, but I love what can be done with it.

Freire’s philosophy is perhaps better defined for what it is not (it is not what he calls banking education). What it is, to me, is what is in this presentation. This presentation also has some thoughts about how I think his ideas could be applied to the current educational system.

It may make for a nice debate, so I thought why let all the work go to waste, right?

Well, here it is: http://prezi.com/3wsh5y4vtl4c/

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