Saturday, 26 May 2012

Invisible women


I was listening to an RSA podcast by Mark Easton about his book Britain Etc.  It sounded like an interesting read, and I will probably get it at some point.  If you don’t already know about the RSA podcasts then it is worth exploring the archive.  Every week they have a speaker (admittedly often with a book to sell!) who gives a 30 – 40 minute talk and then answers questions.  They have some really fascinating speakers, with many different view points, not all of whom I agree with.

However, it was a question from the audience at the end of the Mark Easton talk that has set me thinking.  It was from Christina, who represents ‘invisible women.  She asked ‘Where were the women in the book?’  And Easton obviously struggles to identify any named women in his book. Oops.

I like the idea that there is someone who represents ‘invisible women’.  A little like the Lorax who speaks for the trees.   Someone who asks the awkward question ‘Where are the women?’

The invisible women have been a problem in science for a long time.  It is well known that the path towards ‘scientist’ is a very leaky pipeline and there have been many attempts to deal with this, and to encourage more women to remain in Science, Engineering and Technology.

Last year, Ofsted published a report ‘Girls’ career aspirations’. One, slightly depressing, finding was:

Almost all the girls and young women who took part in the survey were open to the possibility of pursuing a career that challenged gender stereotypes, if the career interested them sufficiently. Their awareness of this potential, however, did not always translate into practice.  page 4

Ofsted visited primary schools as part of the survey, and they found that from year 3 children were thinking about what type of career they would like to do, albeit fairly stereotypical ones*. Further up the education tree, Ofsted also found that careers education at KS3 was weak, which made it difficult for girls (and presumably boys) to make choices which challenged their stereotyped ideas.

Which set me to thinking, given the dismantling of the careers advice service, what classroom teachers could do to support all students in their future career choices, and open up a wider world of ideas to them.

Although focussed on increasing the numbers of girls studying Physics at post-16, the Institute of Physics publication ‘Girls in thePhysics Classroom: A teachers guide for action’ is a useful resource when thinking about promoting careers.  The publication suggests that relevance to ‘real life’ is an important factor in enjoyment and take-up of physics, especially for girls.  Using information about scientists and science careers is, I think, an ideal way of increasing the relevance of science to learners.

A recent twitter discussion about classroom displays, started by @hrogerson, led to a discussion about what could go on the walls. Shortly after this, @sciteachcremin wrote an interesting blog post about the displays that he is required to put up for his school. I think that many secondary schools are quite a long way behind primary schools in making the school environment a rich visual stimulus. Walk into any primary school and the displays are usually eye-catching, curriculum linked, and regularly changed. 

This then, dear reader, is today’s suggestion:   

Use classroom displays to highlight the ‘invisible women’ who work in science, technology, and engineering based careers. 

Make sure that ALL the students in your class know what different careers they can follow if they study science.  Help them to find out what it takes to be a radiologist, an accident investigator, a landscape gardener** and so on, and make sure that they know that it can be done by women, as well as men.

I run physics courses for teachers, and one of the things that I say a lot is that you need to make sure that the contexts used in physics appeal to everyone in the class at some point, and that those interests will be many and varied.  We can’t assume that you can pop in a reference to football and hair straighteners and BINGO you’ve contextualised the learning for everyone!  More on that another blog, perhaps.

In much the same way, in all science teaching, by introducing different careers, you begin to provide all the students in your class with role models and information about what they might do.  So if a student is interested in medicine, then it is worthwhile highlighting some of the other careers in the health service to them – after all they’re not all going to become doctors.

One of the difficulties here though is that as a classroom teacher we don’t always have the level of careers knowledge that we might like.  Luckily there are a whole raft of useful resources out there which can help. 

Future morph - website set up by the Science council to highlight different science and technology based careers.  There are sections of the site aimed at different age students, parents, teachers and careers staff.  Plenty of ideas here including this list of examples of careers linked to different science topics. 

Talent 2030 –Aimed at students, but useful for teachers.  Mainly engineering information, with a nice section of ‘Heroes’ showcasing some of the career possibilities. 

WiSET – Some interesting case studies from women at different stages of their careers, from apprenticeships to management and leadership.
NHS – If you’re not sure what jobs there are in the NHS apart from the doctors and nurses then this website will give you some ideas!
Steminist – US based, but does have a nice list of historical figures (most of whom you won’t have heard of, but should have) and interviews with women currently working in STEM careers.

And the final resource I'd like to highlight is This is what a scientist looks like. A very lovely collection of photos of people working in science, sometimes out in the field, sometimes not, to show what science looks like.  People from all over the world represented here. Scroll down to the bottom to get to the archives with hundreds and hundreds of photos and short bios about scientists!
So, go and speak for the 'invisible women' and maybe inspire all your students!

"In discussion about what they would like to do for a job, the youngest pupils talked about wanting to become teachers or vets (girls), footballers or pilots (boys). The Year 6 girls interviewed had a wider idea of what they might like to do with some already talking of science alongside nursing, teaching, police, armed services, care services, hairdressing and beauty work. Boys continued to prefer sports or applied technology vocations, a games designer being a popular notion. Around half (51 out of 112) of the Year 6 boys spoken to were thinking of these two areas. In contrast, only four of the 113 girls surveyed referred to sport (horse riding and gymnastics) while 43 were aiming at performing or graphic arts, or writing. Only five girls and six boys had no definite thought about a future job. No Year 6 pupil, girl or boy, wanted to be a nursery nurse or childminder although they all thought that these were ‘girls jobs’." Girls' careers aspirations, Ofsted, 2011, pg 7.

** all taken from Future Morph careers list.

Monday, 14 May 2012

Shooting for momentum


Momentum is a tricky concept to grasp.  It’s not entirely clear, at least to students, what the advantage of using momentum is compared with say, velocity or force.

It doesn’t help that it’s quite tricky to clearly show differences in momentum.  The typical example that I used to use was to compare a truck and a car, or perhaps a motorhome and sit-on toy.
 
The question is then, which would you prefer to be hit by?  Why? 

A large motorhome ... would hurt if it hit you!
Toy Tractor - would still hurt, but not as much














However, the difficulty here is that it’s difficult to separate out the ideas of size, mass, and speed from momentum.

I wanted to think of a way that would allow a more direct comparison of objects for a discussion of momentum.  One of my colleagues uses a Nerf gun as a demo of momentum, and I wondered if it would be possible to adapt it to make some more quantitative measurements of momentum.  She has stuck a ballbearing onto one of the darts for the gun. She then asks a volunteer to stand against a wall and asks them which they would prefer to be shot with. 

Which would you want to be shot at you?  Why? 
Most people choose the dart without the ballbearing.  Are they right?  Let's see.

Adapting the demo:
 
Step 1: Get hold of a Nerf gun (or in my case, cheap replica).
Bought from a cheap shop!


Step 2: Use blu-tac and small washers to add mass to two of the darts.  I stuck one washer and two washers on the darts to see if there was a relationshop between the distance they flew and the added mass.

The prepared experiment!

Step 3: Find a large room and fire the three darts, keeping the gun straight and as close to the same position as possible.

In that classic POE process – predict what you would expect to happen?  Why?
 
Step 4: Observe. 
As I expected the darts flew different distances – with the unweighted dart going the furthest.  I tried this a number of times and each time the lightest dart flew the furthest.

The advantage of using the gun is that the force applied in each case is the same, and the shape of the darts are (pretty much) the same.   

This makes it easier to discuss the idea of momentum as a product of mass x velocity and not get hung up on being run over by a motor home.

I’m planning on repeating my experiment, but actually taking measurements, and possibly videoing and then analysing the results to calculate momentum.  Details to follow…



Friday, 20 April 2012

The best CPD I've ever had...


There are many claims made by teachers about Twitter.  Something that I've seen tweeted a few times is that Twitter is 'the best CPD I've ever had.'  As someone who now provides CPD for a living I always find that statement very concerning.

However, I think that part of the reason that Twitter is a useful source of CPD is that it is immediate, often focused on a topic of immediate relevance to the tweeter, and can lead to a sustained conversations.  The fact that so many teachers spend Mondays (#asechat), occasional Tuesdays (#sciteachjc, Wednesdays (#InthePicture) and Thursdays (#ukedchat) taking part in twitter chats shows how valuable teachers find this.  Not to mention the impromptu discussion of pedagogy, education policy etc that take place at other times of day (and night).

However, I do wonder if these learning conversations could be migrated into the 'real' world.  At work, we have a Journal club. Once a month a few of us meet together to discuss a paper from educational research, and consider its relevance to us, and the teachers we work with. We usually meet over lunch, and spend about half-an-hour chatting around the paper. I've found it really beneficial to have this space to think more deeply about teaching, and CPD provision, with colleagues.  As with teaching, during the course of a normal working day, usually it's hard to make time for professional conversations, so making time for journal club is great.

Which made me wonder if it would be possible to develop something similar in science (or other) departments.  Think about the conversations that take place in your prep room or staff room. In my experience it's rare for professional learning conversations to take place day-to-day in schools/colleges. You're so busy with the day-to-day busyness of teaching that it's hard to take a step back to discuss what you're doing, why, and how it could be better.  Even training days / department meetings are often taken over by admin and bureaucracy, not professional development.

To digress slightly...
In one of my previous schools, the science department was split over 3 blocks. Often, you wouldn't see some members of the department from one week to the next. To try and encourage us to get together more often we started 'Cake Friday'. I drew up a rota and each week we would meet together in a room, have cake and chat. (On a recent visit back there, I was pleased to see that it was still going on. A fine legacy I feel.)

Back to twitter chats...
Wouldn't it be great if the professional conversations that teachers have on Twitter (and we have in journal club) could be had in school? 

I was able to talk to a couple of HMIs from Ofsted recently. One of the things that struck me was a comment made that regardless of the grade of the school, they often saw examples of good practice in every school.  However, in some schools, this was in isolated classrooms, and was not shared between staff.  This matched with my experience that teachers don't get the opportunity to discuss their practice together.

A suggestion then, dear reader. If you enjoy the professional development you get from twitter, why not try to do something similar at school.  Take the chat topics and summaries from your favourite chat, and use them to have semi-structured professional conversations in school. Probably not every week, but maybe once a half term. Encourage colleagues to meet together to discuss what they've tried out in the classroom recently, to reflect on their teaching. 

You could even try your own version of cake Friday to ease the flow of conversation.

It could be a great way of developing your own real-life 'best ever CPD'.

Thursday, 12 April 2012

Taking part in 'real' science.


A series of tweets this morning started me thinking about involving kids in science experiments.  The conversation started with a tweet about Chemistry in the Olympics on the new RSC site ‘Learn Chemistry’.  

The experiment is similar to ones which I have used in the past, especially when working on CREST awards or experience weeks with students.  The RSC experiment looks at the effect of a ‘sports drink’ on performance in a 100m run.  There is a comprehensive risk assessment, and suggestion that collaboration with the PE department might be appropriate, which I thought was good.

However, the experimental design itself wasn’t ideal – there was no real control condition or attempt at a blind (or even double blind) test.  Personally, I would probably have used each student as their own control.   The first measurement would be the time for the initial 100m run, followed by a timed rest during which they either drink water or the ‘sports drink’, and then finally timing their 100m run again.  The dependent variable would therefore be the change in time, rather than the average group time.

My main thoughts about the experiment though, were to wonder what the purpose of the study were.  It is purported to be a global study, with results being uploaded to the RSC website and displayed on a world map and in a bar chart.  But what exactly will this show?  Will different countries have different average 100m runs?  And if so, what will that signify? 

The RSC Press office tweeted the following about the experiment:

  • We wanted to do something quick, easy and open to discussion.  We also have to fit in with…
  • schools’ timetables and resources.  If they had a spare day we could devote a much longer expereiment though I’m not…
  • sure how many kis (sic) would want to keep running all day!

The instructions for the experiment actually say “There is unlikely to be any effect from sports drinks on a 100 metre run, therefore we wanted to introduce a critical evaluation part of the experiment for the students to discuss in the classroom.” Which suggests that the main point of the experimental design is to provide a model which needs improving.  Whilst I’m all for students learning about null results, I think many teachers would rather try an experiment that was likely to show some differences.

Using live data from around the country is not new.  For example, the Wellcome Trust ‘In the Zone’ project has live data on the site. You can compare data from across the country, and there is still time to take part in this, using the kits that have been delivered to every school.

Last year, during the International Year of Chemistry, there was a Global Water experiment.  During the time the experiment was live, over 100000 students took part in 4 different activities and uploaded their data to the website.  Although data collection is now closed, the experimental protocols are still available, and would make an interesting project for schools.  The data is also still available allowing truly global comparison of water sources.

The Open Air Laboratories Network, OPAL, can also allow schools to get involved in collecting data.  They’ve got surveys on Earthworms, Bugs count, Clouds and biodiversity. The data is being analysed by professional scientists.  Well worth a look if you’re interested in the outdoor classroom.

Similar to OPAL is iSpot – a website where you can upload pictures of nature, and the online community will then identify what it is that you have photographed.

Which is why I thought that the RSC had missed a great opportunity here.  I know that they wanted to link to the Olympics (who doesn't?), but there are lots of great crowdsourced, real science projects that are being done out there. 

Taking part in science – a different way.
By coincidence, today I had arranged for my kids to take part in ‘real’ research.  The Institute of Neuroscience at Newcastle University has a volunteer register which I have signed up to.  When researchers need experimental subjects they can advertise their project and members of the public can volunteer to take part.  I suspect that other universities (and especially psychology and neuroscience departments) have similar registers.  There could even be opportunities for classes of students to take part in experiments.

So today my kids were part of a control group in a study which is looking at planning hand movements and how it changes with age.  It showed them that science can be done by normal-looking people, and they got some sweets at the end of it.  Result!

Wednesday, 4 April 2012

Can you see what it says yet?

For a while now I have used water bubbles (aka super absorbent polymer balls or hydrogel balls) to discuss refractive index and to illustrate the difference between transparent and translucent materials.

You may have seen them discussed on an episode of QI (though I don't recommend the use suggested by Jack Dee at the end of the clip). 



These little balls start out tiny, but can absorb water to grow many times their original size as you can see from the photo.  

Comparing the dry and hydrated bubbles

The waterbubbles, when dropped into water, are almost invisible.  This makes them a nice starter demonstration when teaching refractive index. I start with a bowl of ‘mini bouncy balls’ and a bowl of water.  Tell students that the waterbubbles are ‘magic’ and drop them into the water.  They disappear!  This can be used to elicit some interesting questions and hypotheses about what has happened. 

And they’re a lot less sticky than the pyrex test-tube in glycerine demo that I used to do. 

The waterbubbles have almost exactly the same refractive index as the water, so the light passing through them continues to travel in a straight line without refraction.  That means that we can’t see them and they are invisible.

Even in primary school they can have their uses.  Children are taught that light can pass through some materials (transparent) but not others (opaque).   However, children will also know about opaque materials which let light through, but you can’t see what is on the other side.  In opaque materials the light is scattered as it passes through, and so the ‘picture’ is lost because you’re looking at light from lots of different places on the object.

To demonstrate this, I put lots of the hydrated waterbubbles into a clear plastic container and put it on top of a short poem.  The refraction of the light at the air/water/air boundaries mean that the light is scattered and you can’t see the poem, although you can see that there is something underneath.

Waterbubbles on top of the poem.  They are a model of a translucent material
 
Slowly add water.  As the water covers the waterbubbles they no longer refract the light, and the poem underneath starts to become clearer.

Can you tell what it says yet?
Finally, when all the waterbubbles are covered you can read the poem in its entirety.  The light passes straight through the bubbles, and to you.  

Waterbubbles fully covered with water.  A model for a transparent material.

For older students, you could have them sketch what is happening to the light as it passes through the boundary of the balls, and ask them the explain what they have seen using the terms: refractive index, refraction, boundary, air, water, light.

You are now asking “Where can I get these wonderful water bubbles?”.  The ones in these pictures were taken out of a cheap gel air-freshener, rinsed to get rid of the perfume oil, and put in water to plump them up a bit.  They are used in flower arranging, so a local garden centre or florist might stock them.  I have also bought some from waterbubbles.co.uk in the past.

Friday, 30 March 2012

Starting again.


It’s been a while since I started the blog.  Since I began much has changed.  A couple of year ago I began with the idea that I would comment on science stories published in the news.  However, since then I’ve changed my job and that has given me a different perspective on things.

Nowadays, I’m much more interested in the education side of things.  Perhaps because, having left the classroom, I now have time to think.  Time you don’t have when you’re working in the classroom. 

And then there’s twitter.  A flood of ideas, diatribes and social chat.   

So now I’m thinking that a blog would be a good place to record my thoughts about what I’m reading and pondering.  Probably still science linked, but I suspect that education will creep in quite often.

I hope we enjoy the ride.

Tuesday, 27 October 2009

Atlas of Risk

The National Health Service website has a really interesting tool on it - the Atlas of Risk.  The aim is to put the relative risks that we all face into context.  It's well animated, and quickly and easily shows different risks to males and females, to different age groups and to different areas of the country.

You can also click through to find out more information about each type of risk.  Great fun, and a very visual way of thinking about the ideas of risk with students - for example the difference between percieved and actual risk, the size of risk and how it is measured, making informed decisions about the management of a given risk and that everything we do carries some form of risk.

I was particularly struck by the difference in risk for males and females in the North East.



Another excellent use of taxpayers money!