Ah, the joy of modern media. You can publish a film one week, and the following week you see a tweet from a teacher who’s incorporated ideas from it into their lesson. Even better: they post a photo of their students exploring ideas around air pressure via the approach in the film.
Photo above from Tom Sherrington, @headguruteacher. Huge thanks for allowing us to repost, Tom – it’s a delight to see this stuff getting used.
Monday’s posting of the visking tubing film was the last of the demo videos we made to support Get Set Demonstrate. The culmination of the project comes during National Science & Engineering Week: on 20th March 2014, The British Science Association are coordinating a national Demo Day.
Teachers are invited to join in simply by performing a demonstration to their classes on the day. Sign up at the BSA’s site to show your intention: take the pledge! There are equipment discounts from Timstar up for grabs, too.
We’re not quite done with our contribution, however. Our long-heralded Demo documentary will hit the web in early March.
This is the second Biology film we’ve made as part of the “Get, Set, Demonstrate” project. One of the films we were asked to look at was “Making Poo: The Digestive System” but we felt that this was not what we would strictly call a “demonstration” of digestion (since no actual digestion takes place), but rather an illustration of the process. Instead, we chose to make a film about using Visking tubing to model digestion and use it to explore the reasons why you might choose to carry out a demonstration of an activity which can be (and often is) done as a class practical.
This film was produced for the Get Set Demonstrate project. Click through for teaching notes, and take the pledge to perform a demonstration to your students on Demo Day, 20th March 2014.
This is an example of a demonstration where video doesn’t come close to capturing the awesomeness of seeing it for real. I love seeing students have the same reaction to it as I did when I first saw it – one of joyful wonder at seeing something which appears to defy the laws of physics, of seeing something impossible.
Pearls in air can be a tricky demonstration to set up and I have to confess that, until making this film, I’d never had to set it up myself as I’ve always worked in schools where the physics technician did it for me. The version shown in the video isn’t perfect – it’s possible to get a better looking stream of “pearls”, but I’m OK with that because it’s honest in its depiction of what can be achieved in a limited amount of time with limited resources.
I find this demo incredibly useful for teaching about projectile motion and it’s a nice companion to the monkey and hunter demo which I think was the first demo film Jonathan and I made together.
This film was produced for the Get Set Demonstrate project. Click through for teaching notes, and take the pledge to perform a demonstration to your students on Demo Day, 20th March 2014.
No other film in this series provoked more discussion and argument than this. Mostly from me. It’s a classic demo and was highly-requested in the nomination stage of Get Set Demonstrate, yet I argued against filming it.
For many years I made essentially all the science programmes that went out during the UK’s teatime ‘children’s television’ window, and there were only a few demonstrations I flat-out refused to show. This was one of them. You can show a safe method, you can treat the science with due respect… but with video you have precious little knowledge of your audience. You can’t tell when their attention has drifted away and they’ve maybe missed a crucial detail, you can’t be 100% certain of the message they take home, and most importantly you can’t guess what they might be tempted to try for themselves.
In person, the heat from the fireball is impressive: on video, it’s the size of your TV, or a YouTube window, or your phone. And it’s cold.
Film-makers can’t be responsible for the behaviour of their audience (discuss, 20 marks), but in this case the risk is very, very high. If 100,000 children saw the demo in our show, and 1 in 1,000 tried it themselves, and 1 in 100 set the curtains alight… that’s not something I ever wanted on my conscience. It’s not that the demo is too dangerous, it’s that it’s too easy. It’s trivial to perform it yourself in a kitchen, and the results can (and will) be catastrophic. So I never filmed the demo. Until now.
Others on the team eventually convinced me, using effectively the same argument applied backwards. The demo is straightforward to reproduce, and reproducing it is dangerous. Knowing that – understanding how and why oil fires are dangerous – might just save someone’s life, and for that reason alone, the team argued, this demo should be known and used in schools, and hence we should make this film.
I’m glad we did.
Three quick notes:
This film was produced for the Get Set Demonstrate project. Click through for teaching notes, and take the pledge to perform a demonstration to your students on Demo Day, 20th March 2014.
As a Physics teacher, I’ve got a long list of classic demonstrations at my disposal for use in teaching everything from pressure to electricity to conservation of energy. I’ve had to teach some Biology in the past and I think it’s fair to say that Biologists are not so well resourced when it comes to demonstrations.
A large part of the reason for doing demonstrations in class, I think, is to get our students to look closely at the world, to really observe it in detail. In Biology, that means taking a close look at living things and the components of which they’re made. This video is unlike any of the other demonstration films we’ve made so far, but it was one of the most interesting I’ve worked on – I came away convinced that if I teach Biology again, I’d definitely make more use of dissection as a teaching tool.
This film was produced for the Get Set Demonstrate project. Click through for teaching notes, and take the pledge to perform a demonstration to your students on Demo Day, 20th March 2014.
The collapsing can demo is one I loved seeing for the first time when I was at school, although my teacher used a tin with a screwed down lid which took a little more time to cool down. In some ways I prefer the version using a can with a screw lid because the additional waiting time makes for an even more dramatic “collapse”. Doing the demo with a drink can is of course far cheaper (and I think, more reliable as it doesn’t depend on the lid being screwed down properly) and I suspect this is why the approach we use in our video has become far more widespread in schools.
I like the demo a lot but, as I hope we’ve managed to convey in the video, I think we need to be careful how and why we use it in our lessons. This is a really fantastic demo for using the Predict, Observe, Explain (POE) approach as the explanation of what’s going on is not entirely straightforward – there are a couple of things relating to the behaviour of particles and the action of forces that need to be considered and this can lead to some really interesting discussion with students, providing they’re familiar with the relevant concepts.
We’ve suggested in our video that the collapsing can demo can be used in conjunction with another demo, as a way of “scaffolding” (I really hope I’ve used that term correctly – I think this may be the first time I’ve used it in writing in this context).
Once you’ve done the demo live in class, you’ve got the perfect justification for showing your students this video of a rather more spectacular demonstration of the same physics at work:
This film was produced for the Get Set Demonstrate project. Click through for teaching notes, and take the pledge to perform a demonstration to your students on Demo Day, 20th March 2014.
As well as being a science geek, I’m a magic geek. I’m not sure if anyone’s done the research on this, but I suspect those are two groups of people where there’s a significant overlap. I’ve got an entire live science show I do based around my love of magic and my somewhat lame attempts to become a magician and I include this demonstration as a highlight in the show. Like many of the demonstrations we’ve filmed, I don’t think video can do justice to how amazing it is to see in real life – it appears to be genuinely magical and always gets an “ooh” from the audience.
I’ve used the iodine clock in class purely for the effect it has of enthralling my students, but, as I hope the video shows, it can be used to achieve particular learning objectives. Mind you, I hope it’s clear that we at sciencedemo.org think “enthusing students” can be a sufficient justification for using a particular demo, if you’re going to take that enthusiasm and use it to help students get more out of your science lessons in general.
This film was produced for the Get Set Demonstrate project. Click through for teaching notes, and take the pledge to perform a demonstration to your students on Demo Day, 20th March 2014.
We appear to have been quiet here primarily because we’ve been busy. It’s one of those weird zen tricks, and it looks like this:
Yes, we’ve been filming again. Aficionados of the Physics Demonstration Films will recognise Alom’s lab at Camden School for Girls, and it was good to be back there after a couple of years. However, you may also notice the lab glassware. A beaker, in a physics film?
Nope.
We filmed some chemistry too. And not all of it was with Alom. Though Laura did wear a purple shirt to fit the house style.
Oh, and if you wonder how much effort goes into these films – we slave over the scripts, but the first time we’re all in the same room with the props and the camera is when we’re set to shoot them, so this happens:
So, yes: science demo films, coming soon to a website near you. Yay! Oh, and: Biologists, don’t despair! We’re featuring squishy things too (rather than merely things that blow up or don’t work, obviously), we just haven’t shot those films yet. We’ve another surprise to reveal before then.
