O'Really?

June 23, 2017

Nine ideas for teaching Computing at School from the 2017 CAS conference

CAS

Delegates at the Computing at School conference 2017 #CASConf17 answering diagnostic questions, picture by Miles Berry.

The Computing At School (CAS) conference is an annual event for educators, mostly primary and secondary school teachers from the public and private sector in the UK. Now in its ninth year, it attracts over 300 delegates from across the UK and beyond to the University of Birmingham, see the brochure for details. One of the purposes of the conference is to give teachers new ideas to use in their classrooms to teach Computer Science and Computational Thinking. I went along for my first time (*blushes*) seeking ideas to use in an after school Code Club (ages 7-10) I’ve been running for a few years and also for approaches that undergraduate students in Computer Science (age 20+) at the University of Manchester could use in their final year Computer Science Education projects. So here are nine ideas (in random brain dump order) I’ll be putting to immediate use in clubs, classrooms, labs and lecture theatres:

  1. Linda Liukas demonstrated some intriguing ideas from her children’s books and HelloRuby.com that are based on Montessori education. I shall be trying some of these out (particularly the storytelling stuff) at code club to keep girls involved
  2. Sue Sentance and Neil Brown from King’s College London gave an overview of some current research in pedagogy.  They discussed research questions that can be tackled in the classroom like (for example) do learners make more progress using visual programming languages (like Scratch and Blockly) or traditional text-based languages (like Python and Java etc)? Many of these research questions would make good projects for undergraduate students to investigate in secondary schools, see research on frame based editors, for example.
  3. Michel Wermelinger from the Open University demonstrated using iPython notebooks for teaching data literacy at the Urban Data School. Although I’m familiar with iPython, it had never occurred to me to actually use iPython in school for teaching. It is a no-brainer, when you think about it, even for primary, because you have your code, inputs and outputs all in one window, and can step through code execution instead of (or as well as) using more conventional tools like Trinket, Thonny or IDLE. Data literacy is fun to teach.
  4. Miles Berry from the University of Roehampton demonstrated Diagnostic Questions in Project Quantum. These are a collection of high quality quizzes to use interactively for example as hinge questions, where teaching is adapted depending on answers given, like this multiple choice question:
    Consider the following Python code:
    
    a = 20
    b = 10
    a = b
    
    What are the values of a and b?
    
    A: a = 10, b = 10
    B: a = 20, b = 20
    C: a = 30, b = 10
    D: a = 10, b = 20
    

    You’ll have to try these five questions to check your answer. The useful thing here is that DiagnosticQuestions.com (the platform on which this is built) allows you to see lots of responses, for example each answer (A, B, C or D) above was selected by 25% of participants. You can also view explanations which illuminate common misconceptions (e.g. the classic mistake of confusing assignment with equality) as well as providing a bank of free questions for use in the classroom.

  5. Mark Guzdial from GeorgiaTech discussed using learning sciences to improve computing teaching. He demonstrated predictive questions (e.g. ask students What do you think will happen when we run this code? before actually executing it) alongside what he called subgoal labelling. These are simple ideas (with proven benefits) that can be put to use immediately. I’ll also be trying the Live Coding (with Sonic Pi) and Media Computation he demonstrated asap.
  6. Laurence Rogers demonstrated Insight: Mr. Bit  this looks like a good app for using BBC microbits in the classroom, connected to a range of sensors, provided you’ve got access to iPads.
  7. A copy of Hello World magazine was in the conference bag. The summer 2017 issue has an unusual article from Ian Benson from Kingston University and Jenny Cane describing their use of the Haskell programming language to teach 5-7 year olds to reason symbolically and learn algebra before arithmetic with help from Cuisenaire rods. The Scratch Maths project at University College London are doing similar things, building mathematical knowledge using Scratch, rather than Haskell. These are experimental ideas you could try out on unsuspecting (junior) family members.
  8. Lee Goss from Barefoot Computing, described the free CPD for primary school teachers on offer from BT. I’ve signed up and hope to plug some of the shortcomings in the Code Club Curriculum.
  9. Richard Jarvis demonstrated appJar, a handy Python library for teaching Graphical User Interfaces (GUIs). That’s Jar as in Jarvis and Jam, not JAR as in Java ARchive BTW. I’ve not tried GUIs at code club yet, but appJar looks like a good way to do it.

There were lots more people and projects at the conference not mentioned here including tonnes of workshops. If you’re interested in any of the above, the CAS conference will be back in 2018. Despite the challenging problems faced by Computer Science at GCSE level, it was reassuring and inspiring to meet some members of the vibrant, diverse and friendly community pushing the boundaries of computing in schools across the United Kingdom. Thanks again to everyone at CAS for putting on another great event, I will definitely consider attending next year and maybe you should too.

March 15, 2013

Creating with the Raspberry Pi vs. Consuming Apple Pie at the Manchester Raspberry Jamboree

MiniGirlGeek

Thirteen year old Amy Mather aka @MiniGirlGeek steals the show at Manchester Raspberry Jam 2013

Last Saturday, the first ever Raspberry Jamboree rolled into town, organised by the unstoppable force of nature that is Alan O’Donohoe (aka @teknoteacher). The jamboree looked at the educational value of the Raspberry Pi (a $25 computer) one year on from its launch on the the 29th February 2012. Here are some brief and incomplete notes on some of the things that happened in the main room, aka ‘Jamboree Central’. The workshops and other events have been covered by Jason Barnett @boeeerb.

A key feature of the Raspberry Pi foundation (and the Jamboree) was neatly summed up by Paul Beech (aka @guru) who compared the Raspberry Pi to various Apple iThings. Paul’s view is that when it comes to computing, Apple gives you a “sandy beach, sunbed and cocktail” to passively consume digital content with while the Raspberry Pi gives you a “desert, knife and a bottle” to actively create new things (see his tweet below).

Consuming Apple Pie on a sandy beach, with a sunbed and a cocktail

Engineering evangelist Rob Bishop used Apple Inc. to illustrate what the Raspberry Pi is about in his talk ‘one year on‘. Rob pointed out that a huge amount of effort at Apple Inc. is put into making Computing invisible and seamless. This is great if you’re consuming content on your iPad or iPhone, and what many users want – easy to use, with all the nasty internal gubbins tucked away, out of sight. This is tasty Californian Apple Pie, which many of consume in large amounts.

However, invisible computing is a problem for education, because it is difficult to demonstrate the Wonders of Computer Science (Brian Cox’s next TV series) with a device like the iPad.  Many of the internals of modern devices are completely inaccessible, and it’s non-trivial for budding young engineers to build anything very interesting with it particularly quickly.

In contrast, the Raspberry Pi can be challenging to setup, just getting the Operating System up and running isn’t always straightforward. However, there’s a ton of interesting stuff you can build with it: Nifty robotics, bionic bird boxes, musical hackery, twittering chickens, live train departure boards, internet radiossinging jelly babies and loads of other pideas. Try doing that with your iPad…

Creating with Raspberry Pi in the desert, using a knife and a bottle

Most of the jamboree focussed not on Apple but on the things that can be created with Raspberry Pi: the What and Why and When And How and Where and Who with keynotes from Steve Furber [1] and talks and panel sessions from:

A highlight of the jamboree was the closing keynote given by the thirteen year old Mini Girl Geek on what she’s been doing with her Raspberry Pi. MiniGirlGeek (aka Amy Mather pictured above) stole the show with her demo implementations of Conway’s Game of Life in Python. [update: see video below]

What’s interesting is that Conway’s Game of Life is used as an exercise for first year undergraduates in Computer Science at the University of Cambridge. So it’s great to see teenagers mastering the “knife” of Raspberry Pi, and reminds us that Raspberry Pi is no “sunbed and cocktail” but with a little patience, ambition and talent there’s plenty to capture the imagination of young people about Computing.

References

  1. Steve Furber et al (2012). Computing in Schools: Shut down or restart? Royal Society Report

May 3, 2012

Need to re-invent the Web (badly)? There’s an App for that!

The Mobile App Trap

The App Trap: Why have just one Web App when you can have hundreds of mobile Apps? A selection of popular Android apps from Google Play, also available for iPad and iPhone from the Apple App Store

I love the convenience of mobile applications but hate the way they re-invent the wheel and are killing the Web. What can be done about it?

I’m in love with the mobile Web

I’ve been smitten with the Web since first venturing out on the information superhighway back in the nineties. This love affair is taken to a new level with the advent of the mobile Web. As an incurable information junkie, having access to news is on the move is great. Using location based services like Google Maps is fantastic, on foot, bike or in the car. I love nerdily scanning barcodes to read Amazon book reviews while browsing the shelves in bookshops, much to Tim Waterstone’s annoyance. And it can be great to have wikipedia in your pocket to settle arguments down the pub.

I hate the mobile Web too

But there’s a big problem with all this appy clappy mobile fun, it’s killing the Web through fragmentation, both for producers and consumers of information. Let me explain.

One of the great things about the Web is that you there is one app to rule them all; a “killer app” called a Web browser. There are several flavours, but they all basically do the same thing using similar technology: they let you surf the Web. One software application (a browser), gives you access to an almost infinite number of Web applications. Wonderfully simple, wonderfully powerful – we’ve got so used to it we sometimes take it for granted.

Now compare this to the mobile Web where each page you visit on a mobile suggests that you download an app to read it. Where there used to be just one application, now there are thousands of glorified “me too” Web browsers apps many of which have re-invented the Web, badly.

Consider the applications in the table below and illustrated on the right. They are all accessible from a Web browser on one of the “four screens ”:  desktop, mobile, tablet and smart-TV:

Native mobile app Purpose Web app
Amazon mobile Online retailer Amazon.com
BBC News mobile News and propaganda news.bbc.co.uk
The Economist mobile More news and propaganda economist.com
eBay mobile online garage sale ebay.com
Flickr mobile photo sharing flickr.com
Guardian mobile Even more news and propaganda guardian.co.uk
Google Reader mobile Feed reader reader.google.com
Google Maps mobile Maps and navigation maps.google.com
MetOffice mobile UK Weather metoffice.gov.uk
PostOffice mobile Postcode / Address finder royalmail.com/postcode-finder
Google Search mobile Search engine google.com
Google Translate mobile Language translator translate.google.com
Twitter mobile Entertaining time-wasting application twitter.com
Wikipedia mobile Encyclopædia en.wikipedia.org/wiki
WordPress mobile Blogging tool wordpress.com
YouTube mobile Videos youtube.com

As you can see, users are encouraged to download, install, understand and maintain sixteen different apps to enjoy this small part of the mobile Web. And this is just the tip of the iceberg, there’s bucket-loads more apps like this in Google Play and the App Store. As a user, you could just use a mobile Web browser on your phone, but you’ll be discouraged from doing so. We’ll return to this later.

Producers and consumers both suffer

As well as being a pain for users who have to manage hundreds of apps on their phones and tablets, the pain is magnified for producers of data too. Instead of designing, building and maintaining one Web application to work across a range of different screens (a challenging but not impossible task), many have chosen to develop lots of different apps. Take twitter for example, in addition to the desktop and Web apps, twitter currently makes no fewer than five different applications just for tablets and phones:

    1. twitter.com/download/ipad (for iPad)
    2. twitter.com/download/blackberry (for Blackberry)
    3. twitter.com/download/wp7 (for Windows phones)
    4. twitter.com/download/android (for Android)
    5. twitter.com/download/iphone (for iPhones)

So a challenging task of delivering content onto a range of different devices has now been transformed into an almost impossible task of building and managing many different apps. It’s not just Twitter, Inc. that chooses to play this game. Potentially any company or organisation putting data on the mobile Web might consider doing this by employing an army of android, blackberry, iPhone and windows developers on top of the existing Web developers already on the payroll. That’s good news for software engineers, but bad news for the organisations that have to pay them. Managing all this complexity isn’t cheap.

Not Appy: How do we get out of this mess?

In the rush to get mobile, many seem to have forgotten why the Web is so successful and turned their back on it. We’ve re-invented the wheel and the Web browser. I’m not the first [1] and certainly not the last [2] to notice this. Jonathan Zittrain even predicted it would happen [3,4] with what he calls “tethered devices”. One solution to this problem, as suggested at last months International World Wide Web conference in Lyon by some bloke called Tim, is to develop mobile Web apps rather than native mobile apps:

There are lots of examples of this. Sites like trains.im provide train times via a simple Web-based interface, no app required. Many Web sites have  two versions, a desktop one and a mobile one. Wikipedia has a mobile site at en.m.wikipedia.org/wiki, Flickr at m.flickr.com, The Economist at m.economist.com, BBC at m.bbc.co.uk/news and so on. But in many cases these sites are poor cousins of the native mobile apps that software developers have focused their efforts on, diluting their work across multiple apps and platforms.

Maybe it’s too late, maybe I’m suffering from the suspicious of change” syndrome described by Douglas Adams like this:

  1. everything that’s already in the world when you’re born is just normal;
  2. anything that gets invented between then and before you turn thirty is incredibly exciting and creative and with any luck you can make a career out of it;
  3. anything that gets invented after you’re thirty is against the natural order of things and the beginning of the end of civilisation as we know it until it’s been around for about ten years when it gradually turns out to be alright really.

The mobile Web makes me suspicous because many apps re-invent the wheel. I’ve argued here that it is against the natural order of the Web, we’ve waved goodbye to the good old Web [5] and its the beginning of the end. I really hope not, it would be a tragedy to carry on killing the Web as it’s given us so much and was designed specifically to solve the problems described above. Let’s hope native mobile apps gradually turn out to be alright really.

References

  1. Gary Marshall (2011). Could smartphone apps be taking us back to the days of “best viewed with … ”? Net Magazine
  2. Jason Pontin (2012). Why Publishers Don’t Like Apps: The future of media on mobile devices isn’t with Apps but with the Web Technology Review
  3. Jonathan Zittrain (2007). Saving the internet. Harvard Business Review, 85 (6) PMID: 17580647
  4. Jonathan Zittrain (2009). The Future of the Internet: And How to Stop It Penguin, ISBN:014103159X
  5. Hamish MacKenzie (2012) Web 2.0 Is Over, All Hail the Age of Mobile, Pandodaily

January 2, 2012

Does Android Dream of Electric Sheep?

Androids by etnyk. What are they thinking?

With more than three million Android devices activated on the 24/25th December 2011 [1] and something like 200 million (or more?) Android devices in total, there are nearly enough droids around to build a primitive brain.

With all that processing power out there, I can’t help but wonder, like Philip K. Dick did, Does Android Dream of Electric Sheep? [2,3]

References

  1. Andy Rubin (2011) http://twitter.com/Arubin/status/151918325260226561
  2. Philip K. Dick (1967) Do Androids Dream of Electric Sheep?
  3. Ridley Scott et al (1982) Blade Runner

Blog at WordPress.com.