More free posters! These are designed to give students a very visual overview of the following GCSE options:
See the post below for editing instructions - these are fully customisable Publisher files so feel free to change as you see fit for your options. Remember, you will need to download the "transport" font for these to display correctly, this is an open source font and so can be distributed freely.
The content on this website is free for anyone to use and will always remain free simply because I fundamentally believe in the principles of comprehensive, free education.
Sadly, however, it has come to light recently that a number of the resources available here (and also some older materials from our KS3 provision) have been uploaded, used and claimed by other individuals as their own.
That's not ok.
There is one key thing to note here - you can only do this if you attribute us/me/this site - in other words, acknowledge that these resources are not your own.
You also cannot sell our resources or derivatives of my resources for profit. This goes against all of my principles.
The reason for this is quality control. I take great pride in the standard of my work and I constantly review and update these resources as I find things I'm not happy with, as I learn from experience and as I simply think things need to be refreshed or changed. For exmaple, I'm practically re-writing unit 2 of the GCSE as we speak becuase I don't think it's good enough. You will be able to get these resources for free as usual.
If you upload our resources, claim them as your own or share them as your own then the people you share with are getting a poor experience. They do not know the origin of your files, nor will they benefit from the constant improvements we make. To see comments on websites from teachers praising these lessons as "outstanding" actually makes me sad - they're not outstanding and that's why we've since moved on from delivering them in that form.
Bottom line - please don't give your students a second rate experience, please don't steal resources and claim them as your own.
If you do not understand the Creative Commons license, mentality and philosophy then click the massive image below. Just because something is given away for free does not give you ownership or copyright.
Being as careers appears to be high on the education agenda recently, I decided to put together a display which can be used in classrooms to highlight the pathways from Year 7 all the way into a select number of careers. It's not designed to be a super informative infographic, literally something which is useful to have, starts a conversartion and clearly shows the fact you have clear paths through school into technology based careers.
It's designed to be printed out at size A0 using a plotter and the file is available to download below. A few notes if you want to use it yourself:
To create new "signs" to add to your display, don't bother trying to grab an image or SVG and then adding text over the top, you'll never quite get what you're after. Instead use rounded rectangles and add text to them, then set the colours using the RGB colour codes available as linked above.
Hopefully some of you will find this useful. If you don't have a plotter, you can go thoroughly old school and get publisher to print it out as a series of smaller pages that you can then tape together. I'd suggest laminating them first if you go down this route!
So, some three years ago I made the fatal error of buying something without having done my homework first. In this case, a very, very expensive washing machine made by AEG called the "Lavamat Turbo." For Google robots and anyone else who may be suffering the same fate and would like to read my tale of woe, the model number of this particular pile of junk is l61470wdbi.
What's wrong with it, then?
Well, it's a two pronged attack from this beast - not only is it terribly made from a reliability and construction quality point of view, but it's also incredibly poorly designed.
Last night, it died for the third time. I'm not sure that one breakdown per year qualifies as decent quality in anyones book, but consdering how ancient I am and the fact I've never actually managed to break any other washing machine in my life, this must be some kind of indicator as to just how appalling this particular machine is. Oh, and I'm fully aware how old I sound recounting my illustrious, long history of washing machine ownership, but there's definitely a technology angle here so bear with me.
The fault, then, was an interesting one. Turn the machine on, select a program, press go. The door clicks, all the lights look happy. As you would expect, I then walked away thinking nothing more about it - the days are long since gone that watching the washing machine cycle to completion was a form of family entertainment...
Then it struck me how quiet everything was. Too quiet. I went back to find the timer happily counting down to itself but literally nothing happening at all. No movement, no water, no swishing of laundry. Eerie silence.
What's wrong here is this - the machine was doing two things:
"Ah! But if it's faulty what can you expect?!"
Being unable to believe anything is fixable only by a professional, I started poking around the internet for answers. It turns out that this machine has error codes. How useful! Yes, if only they actually appeared on the display. This is where, from a design and software engineering point of view, things get really stupid. I learned the magic incantation and performed finger acrobatics on the buttons to reveal the magic error - E41.
What's wrong here?
This is just plain stupid. It cannot even be argued that hiding the error code in some way helps prevent confusion or even protects customers from coming to some kind of harm - it's information! Nothing more. Why decide that some errors can be displayed and others are only for those who have sworn an oath and gone through the sacred order of the washing machine repair person, complete with complimentray rubber seal crown?
Some of the errors it will show you are comedy - there's one called EFO which tells you the water is leaking everywhere. This is one of the errors they could've hidden. I know this becase when this very machine flooded my kitchen it was very, very obvious what had happened...
It is these inexplicable design choices that make my brain boil. I keep going back to this point - Steve Jobs was a genius because he recognised the need for complete and utter design consistency. The need for items to behave in such a way that you never needed to ever encounter a machine behaving in a seemingly random or inexplicable way. Like it or not, this washing machine would never have made it to production if he'd been inclined to design kitchen appliances.
When designing a system, choices are made. Somewhere, at some point, someone consciously made the decision that this machine would have a comprehensive set of diagnostic error codes to help the repair process. However, they also made the decision that this valuable information should be hidden and that the machine should just pretend nothing is wrong?
So what's actually wrong? Well, E41 means that probably the door latch is in some way broken. Either that or the main control board has fried itself. This is one of those "worth a punt" situations because the door lock is £13 and for once I don't have to hump a machine that weighs more than an elephant out of a cupboard to try and fix it for once. The part has been ordered and we'll see what mess I get into when I fail to reseat the seal round the door properly.
The machine that keeps on giving once decided to flood the kitchen. This is something that shouldn't really happen on a grand scale. Would you like to learn about washing machine electronics and control? Of course you would.
I was surprised to learn that the way in which a machine judges the amount of water that is inside it and when to turn the tap off, is not by measuring the flow of water in to the machine - which just seemed to be the way to do it in my head. Instead, there is a small rubber hose inside that has a pressure sensor on one end. As the machine fills with water, the air pressure increases until the sensor reads a certain amount and the control board shuts off the supply.
This is actually quite a reliable way of doing things until. that is, the rubber hose gets a hole in it. This "shouldn't" happen, but it was pub time in the AEG factory when my machine was built and they couldn't be bothered to attach it properly so the drum rubbed a hole in it.
No problem - the machine has a feature to prevent this very problem! It's even part of their sales pitch, the machine is intelligent enough to cut itself out should it suffer any failure in the water department. The question is... why did my kitchen flood then? The answer is wonderful.
Inside the bottom of the machine lies the answer to this "intelligent" function. It's a piece of polystyrene. When water escapes the machine the bottom of the machine floods, the polystyrene floats up which clicks a switch that tells the board to cut the water and turn the drain pump on.
Brilliant. Such a simple solution! With only one minor problem.
The problem is that the bottom of the machine isn't water tight, meaning a lot of water has to accumulate around it before the little float can do its job. Furthermore, the float has to raise about 1cm before it triggers the switch. Trust me, 1cm deep is a lot of water outside of the bath...
In a world where devices are becoming more and more "smart" and more connected for no reason other than "we can" (why I need a wifi washing machine I do not know) there is a desperate need for us to understand that simplicity is still the number one most important factor when designing anything electronic. The fact is we shouldn't forget that the very word "appliance" means something that should be plugged in, maybe have one button pressed and it just goes and does the job it was designed to do. A lot of the time we are trying to solve problems that sumply don't exist or create "convenience" that is verging on the absurd (smart lights anyone?) for the sake of selling kit, rather than actually adding value.
The day my house gets smart lights and an internet connected fridge and washing machine is the day I buy a large set of wire cutters and go on a snipping spree to rid myself of the madness.
We need to understand a simple premise - nothing is free. There is always a price to pay, even for services that are free at the point of sign up or delivery.
Facebook, Whatsapp and Instagram are all free to use and all owned by Facebook/Mark Zuckerberg. If nothing truly is free, then we have a few questions to answer:
We've already discussed the moral angle to social networks, especially Facebook in previous posts, so in light of the annoucement that Mr Zuckerberg finally plans to do the inevitable and merge the three platforms, let's have a look at the privacy angle for a change. and examine the impact this merger will have on you as a user.
There is absolutely no way, in a million years, I would trust a word that came out of this mans mouth.
From a business point of view, Facebook's ownership of three platforms that perform similar or identical functions doesn't make a great deal of sense. Currently you have:
In business, developing, maintaining and hosting services which are similar or do the same thing isn't logical. You're spending too much, employing people to do the same or similar jobs and you're splitting up the data or information you've collected which is by far your biggest asset.
Zuckerberg faithfully promised when WhatsApp was taken over that it would always remain a stand alone service, continuing to be seperate from Facebook. When they took over Instagram they promised the same. No one in their right mind believed him and... blow me down with a feather if he hasn't gone back on this promise and openly announced the merging of similar services.
Of course, this is marketed as being in our best interests and to provide us with a smoother, more customised user experience.
It is not in your best interests.
It's quite funny to talk to students about their social media preferences. They'll be almost disgusted that you'd suggest they use Facebook these days but will openly and passionately advocate their use of Instagram. It's the same platform! Soon, it really will be the same platform.
In software development, web development and hardware management terms it would be sheer madness if Facebook allowed these services to be separate for any longer than is strictly necessary. I will knit the hair of a dog into a fetching jumper if they haven't been working on this merger from the day the takeover was completed.
The future is likely to be quite simple, they don't need three messenger services so they'll close them. This may be explicit in, for example, the removal of direct messages in Instagram and the closure of Facebook Messenger, or it could be far more subtle in that the apps themselves will continue to exist but the underlying code and messaging platform will be identical, only the "front end" will look different.
But why should you care, why does this matter?
The answer is simple. Absolutely everything that has happened since the inception of Facebook has proven one simple fact:
You cannot, and should never, trust Mark Zuckerberg with your data and he has absolutely no respect for your privacy whatsoever.
How can I make such a bold and sweeping statement?
Simply, how can anyone respect your privacy when their entire business model is founded on the principle that they need as much of your data as they can possibly get their hands on in order to sell it to other businesses or advertisers.
Furthermore, Zuckerberg and Facebook have been found out time and time and time again for:
The list is honestly endless. But, there's more.
WhatsApp had a big selling feature - end to end encryption of your messages. Put simply, this means that no one but you and the recipient of your messages should be able to find out what you're talking about. If someone intercepts your traffic then they shouldn't be able to make sense of it. This has a huge business down side - you can't read your users content and trust me, they want to.
If this sounds odd, consider the fact that Google read your email if you have a Gmail account. They're very open about the fact that everything you upload to a Google service, such as your photos, emails and so forth will be used to train machine learning algorithms. Every now and again a real human will need to check that work - which is why you've heard "scandals" recently where Amazon, Apple and Google all had to "admit" they were employing hundreds to workers to listen to thousands upon thousands of recordings from smart speakers, obviously including those false positives when your speaker kicks in when you haven't asked it to. Someone, somewhere listens to you telling your speaker to go away...
People are so used to this invasion of their privacy in return for something free such as an email account or a decent search facility that they either don't notice, don't care or simply its passed them by that this even happens. We've all noticed the "spooky coincidence" that you mention you fancy getting a talking pet frog and then suddenly, all your adverts on social media suddenly turn into pet frog websites. This isn't coincidence and only happens because our privacy has been invaded and eroded to an already unacceptable level.
How does this happen? Profiling and information sharing. You don't need to do anything, log in to anything or do anything out of the ordinary to enable algorithms to work out who you are, what you're doing, what you like and most importantly - to connect your behaviour on different apps, platforms and networks together to effectively follow you around. Data mining and gathering is so good now that an algorithm can work out that you're you regardless of whether you use different devices, different user names or even move around the country. Think about when you spend time with your friends and YouTube suddenly recommends similar things to you - this is based on your location data, data which is so powerful it even tells these companies what job you do, your daily schedule, your shopping habits, who you hang around with, what you do when you're with friends even down to which apps you're all using when you're busy ignoring each other. The bottom line is this - you don't even have to be using an app these days for it to learn all about you and the amount it can learn about it is eye watering.
But Mr Zuckerberg isn't happy with this. He wants, and has your permission to access, more. Zuckerberg wants to be able to tell advertisers as much as is possible about you, what you like, what you do and what you talk about (and to whom). This is where he fell out with the founders of WhatsApp, two people who posessed something crazy and disagreeable to Zuckerberg - Morals.
Facebook want to take data from your messaging habits and use this to profile you further. It makes their advertising platform even more profitable and attractive. Both founders of WhatsApp left citing Zuckerberg's complete disregard for the privacy of users and their data, he is literally hell bent on monetising you and your information whether you give him permission to or not. This is illustrated by the fact that Facebook Messenger is indeed capable of end to end encryption but its disabled by default and buried in the settings where they hope you don't find it.
When this merger of platforms is complete, you can guarantee that your behaviour in WhatsApp will be used to target advertisements to you. You can guarantee that your conversations or use of the app is nowhere near as private as you think it is. In short, you've got to be stark raving bonkers to use these platforms any more.
So what can you do? The answer is simple. Delete Facebook, delete WhatsApp and be careful what you post on Instagram and certainly don't use it for chat. The alternatives are obvious - the guys who founded WhatsApp went and created Signal. It's the exact same thing as WhatsApp, has the same functionality and has the added bonus that they're not out to make money from your conversations.
Just stop and think for a minute - would you want anyone, ever, seeing your messages? I'm not saying Zuckerberg is going to decrypt your conversations, but there is every chance they will be trying to find every possible way to gather data about what you discuss, how, when, where and with whom. This will then be used to link you to behaviour on other platforms. No thanks, not for me.
If you have any sense, you will use Signal or another messaging app and you will get the hell away from anything owned by Facebook.
And we haven't even started on their crypto currency, but that's a story for another time...
To tidy things up and simplify the content and design of this site, we've split off the OCR GCSE Business content on to another site. This meant careful consideration had to be given to the name of the new site, it had to be:
See what we did there?
Share? Interest? Business terms and.... double meaning! It's like learn it with davo 2.
I have no shame. See you there...
You may or may not have noticed the new "GCSE OCR Business" link appaear in the menu at the top of the page. Today I've uploaded the first module of lessons for our students and any other schools to use as they see fit. Hopefully they'll be of some use to you!
Currently, we've only got 1.1 - Business Activity uploaded, the remaning parts of Unit 1 will be uploaded as they are completed.
As usual, if you are a student and you miss a lesson/want to revise a topic then they're a great place to start/catch up...!
Revision resources are planned for the future, most likely in the form of video tutorials. Keep an eye out for updates in the near future!
This year is all about refinement and updating of our resources and the first part of that process has been to change some of the lessons we've been delivering. If you look on the GCSE CS - Lessons page now, the Unit 1 - 1.1 lessons have significantly changed to make them more digestable, to focus more on the important learning points and to, quite frankly, make it a little bit more interesting.
If you do use these resources then keep your eye out for changes as I'll upload new copies of lessons as and when they are updated.
One other target for this year is to update the Unit 1 revision resources to include more video content, just to add another type of resource for revision or lesson purposes. I'll provide an update here when this happens later in the year.
I've recently put together a spreadsheet which collates all the past exam questions into a searchable/easy to sort form.
This should make any future revision/lesson planning/creating assessments quite simple as it only takes a few clicks to find all relevant past questions on either a topic or sub topic.
The data is capable of being organised by:
I've even included the page number on the exam for you...
Please don't ask me to upload or provide copies of exam papers - I get many requests for this and I can't host or email exam papers for the simple reason they're not mine and OCR would probably get a bit upset about it. Exam papers are readily available for anyone at any school delivering the course - if your teacher won't provide them to you then... why not?!
To use, simply open up, click on the drop down and filter by the criteria you're looking for.
I will obviously update this as new exams are released so you can easily revise specific topics or sub topics.
Coming very soon is the A-Level version of this.
Click here to download, or simply visit the GCSE CS section in the menu.
Recently there have been a number of incidents in the world that have highlighted an interesting moral, ethical and in some cases legal debate about social media and who is responsible for the content on these platforms.
Briefly, Instagram is under fire for being a platform where it is trivial to find information and "guidance" on various forms of self harm, eating disorders and even suicide. Several high profile events have shown that young people especially are finding what they see as support groups of like minded people which then normalises their own feelings/actions rather that supporting them in the ways they need to get help.
Facebook has once again come under criticism for the woeful monitoring or moderation of the content on its network (and don't forget they own Instagram so are equally responsible for criticisms levelled there also). In the wake of the recent terrorist attack in New Zealand, it quickly became apparent that one of the main motivators for the attacker was to spread their actions as far as possible using various outlets, Facebook being the originating platform.
These actions have raised several questions which on the face of it are trivial to answer, but when you look into it raise all sorts of questions about who ultimately holds the responsibility to moderate content online. Questions such as:
Australia and New Zealand were in a difficult position - they clearly had terrorist attacks happening in, or linked to, their countries and the attacker had posted their "manifesto" on social media before then live streamed the attacks on Facebook. Both governments called for "more to be done" to prevent this kind of thing happening - which anyone would conclude is entirely reasonable. However, it's also obvious that they're fighting a battle they can't win.
Some ISP's in Australia especially have taken the decision to block certain websites that hosted copies of the attack video and failed to remove it. This is likely to avoid government action or bills being passed that would require further and more sweeping changes to be made. Interestingly, some of the pages that have been blocked have protested their innocence and annoyance that ISP's have blocked them. Clicks = cash, so less traffic is hurting their business.
They're also a little miffed because Facebook has faced no action from governments (as yet) because they "took swift and serious actions." The cynic in you might point out that the reason ISP's haven't blocked Facebook in the same way they blocked other sites is because Facebook forms a huge part of their traffic and if they block it, users will literally cancel their subscriptions and move to an ISP that didn't block them. Arguably, if you're going to put blocks in place, then Facebook has to be blocked - this is where the attack started, was publicly planned and then carried out.
Sadly, then, it seems the frustration most governments feel is with the fact that some companies such as Facebook (and Instagram as they own them), Google and so forth are simply "too big" to be tackled. Sajid Javid, the current UK Home secretary repeatedly makes public statements that social media companies must be more responsible or take more preventative measures or "face action." He knows full well, or will quickly find out, that no matter how much he would like to make changes, he is largely powerless - the internet is not under any one countries control.
So then we move our attention to those social media companies. It is fairly clear that governments can only introduce rudimentary measures and then only in their country or jurisdiction and then these can be easily bypassed by most VPN/Proxy services. Also, the people we are trying to protect the most - the young, are by far the most switched on to technology and they are all capable of bypassing measures either themselves or by following methods by word of mouth.
Therefore, it is not unreasonable to suggest that companies like Facebook should take the lead when it comes to finding, removing or blocking this kind of content altogether. Let's establish some facts - they are the central point, they are the only organisation with access and control to all this content and most important of all, they absolutely are capable of implementing measures that would either completely or vastly reduce this kind of content.
If they want to.
And it's a big "if" isn't it. These companies don't charge users to use the service, they experience an unimaginable amount of content being uploaded to their platforms on an hourly basis and make all their profit from advertising. Advertisers do not care about morals, they care about reaching their target audience as intrusively and repeatedly as is possible. Social media has given them these opportunities in a way never possible before in history - this is why social media platforms like Facebook are worth hundreds of billions.
The sad fact is that Facebook are a business. Business exists for one single core purpose - to make profit. To think that they have a moral obligation is to pull the wool over our own eyes - they absolutely do not. Given the choice between an awkward press release and some soothing words to various parties and actually making changes for moral reasons, they'll choose the press release every time. Any changes that Facebook make that would make an impact in the real world would result in fewer users on their platform. People don't like the idea of "censorship" and are used to an always on, instant upload culture. Any delay in content appearing on the platform would give a "second rate experience." To a company like Facebook this is unacceptable. User count is everything and less users = less profit. They want all of your data and they want more of it. The more they have, the more they're worth.
So yes, if they wanted, Facebook could easily bring in a multi pronged attack that would have a drastic effect. They could easily afford to employ hundreds of moderators in different countries to automatically review flagged content. They could employ their machine learning to analyse content in a more aggressive way and to highlight more for review. They could tighten their guidelines and refuse to allow hate speech on their platform, or to refuse groups advocating certain right wing view points. They could follow through on the terms and conditions all users agree to and remove more accounts, or even bring action against particularly offensive users. The list is almost endless - but all of it comes at a cost.
Did they do anything? Their analysis looks really good. They did immediately remove the video of the attack but... once it was reported. Remember, before it took place, the manifesto, a page of hate speech was already hosted by them without raising any alarm. Remember also that computers are absolutely amazing at text and language analysis and they definitely have the technology to highlight this. Then they hosted a free for all - users uploading the content which they then had to chase down and remove or rely on user reports. Users took measures to obfuscate the video so that it didn't match a hash created of the original stream. From the outside, it looks like they did a lot to prevent the spread. In reality, they did what they had to do to minimise the poor publicity of what had happened on their platform.
Will anything change in future? The answer is no, because the only way Facebook could be encouraged to change is their users closing their accounts. If users started to leave en-mass then they would begin to listen. They made positive noises when users left of the Cambridge Analytica scandal. The unfortunate truth is that millions of users simply don't care, they want to log in, aimlessly read terrible memes and look at pictures of pets and dinners before moving on.
It is, then, perhaps us as users that hold the ultimate responsibility here. We are responsible for not posting offensive content and also we have the absolute power to force change if we want. If you genuinely think that a platform hosting a live terrorism event and then taking zero action afterwards is socially unacceptable then maybe there is a moral obligation on us to no longer associate ourselves with that platform.
Morals and ethics is an endless conversation.
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