💡𝚂𝗆𝖺𝗋𝗍𝗆𝖺𝗇 𝙰𝗉𝗉𝗌📱

  • 12 Posts
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Joined 1 year ago
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Cake day: November 25th, 2023

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  • Lots of us

    Also, who do you mean by “us”? Programmers? Not all the kids in class want to be programmers, and this isn’t a programming class - it’s Computer Science. We cover topics like hardware, the Internet, Cybersecurity, the history of computers, data analytics, etc. Not only do not all of them want to be programmers, not even all of them want to be in I.T. - they’re just, you know, interested in computers (or in some cases they’re in the course because their parents think they should be in it - I’ve had a couple of those students). We only spend 6 weeks on programming (we spend 6 weeks on each topic), or sometimes we might do it twice and spend 12 weeks on it, and that’s it for the year! You can’t teach Year 7 kids algorithms, pseudo code, basic programming concepts (variables, branches, and loops) and OOP as well in one year. Especially when not even all of them are interested in programming. It’s just one topic we cover. OOP is something that shouldn’t be covered until at least Year 8, preferably Year 9 (by which stage students have decided if they want to continue on this path or not, and the ones we still have left we start getting more hard-core… which is where the “us” I presume you’re referring to come in).







  • Python does have OOP but you are not at all forced to use it.

    Not as an individual, but I’m talking about a situation precisely where the individual choices of teachers are ignored, in some cases by school admins, in some cases by faculty choices. Fortunately I also ran a computing club, in which I was autonomous with how I ran it, and I taught my computing club students C#/MAUI… but even then still saw some of the issues you run into with teaching students. e.g. I told them to install Visual Studio ready for next week, showed them where it was, what workloads to install, and then the next week one of the students had installed Blend for Visual Studio, not Visual Studio. “Look, it has Visual Studio in the name!”. (sigh)

    I think weakly typed variables will actually help beginners as it is less to think about to start off with

    No, that’s exactly the problem to start with. Another rule of teaching (see below for the full list I’m quoting these from) is “never let the first impression be a wrong one”. If you let students think they can use variables for anything, then you run into problems when they can’t. This is why teaching them with strong types first is better - they learn you need to be careful with how to use them, THEN maybe you can let them have some more freedom like Python allows.

    In other languages it is considered good style to use indentation anyway

    Yes, but in those languages it’s optional. In Python it’s mandatory, and if someone’s code isn’t working it’s far easier to spot a missing bracket than a missing space.






    • object-oriented (this is their FIRST proper programming language - they don’t even know how to write loops yet and you want us to teach them OOP at the same time?! And as it turns out, I had one student who literally could NOT work out how to use a loop - kept writing 20 variables for 20 iterations. i.e. her variables never varied!)
    • variables are weakly-typed (use it for anything, whether it’s what you first used it for or not, Python doesn’t care)
    • indentation has to be exact (i.e. no brackets, just exact indentation). I had one student whose program wasn’t working, and it even took ME a while to find what was wrong with it (a missing space).

    I think there was more, but that’s what I remember off the top of my head. If it was up to me then I would’ve used Pascal - that’s what it’s designed for! But at least C# has strongly-typed variables, and doesn’t care about your indentation (and unfortunately there was no non-OOP language choice available - I’m not sure how this got in the curriculum when every teacher knows you only teach one concept at a time). As I said, many other teachers felt the same way, but couldn’t get it past their school admin’s.


  • I, as a teacher, have had to learn several languages, but that’s not the dumb reason bit. The dumb reason bit was WHY I had to teach Python, which once I learnt it (so I cold teach it) I could see right away was NOT a suitable language for teaching to Year 7 (who up to now have only used Scratch). I was teaching the U.K. curriculum, and I found out that teaching C# was also allowed - still not ideal, but better than Python for learners -but pretty much all schools were teaching Python. When I dug into it I found I was far from alone in not wanting to use Python… and I also found out the reason schools were teaching Python. It was because from an ADMINISTRATIVE point of view it was much easier for the schools to have us teaching Python. In other words, the office-workers who didn’t have to teach it, only had to admin it, were forcing everyone to teach Python because they wanted the lower overhead that came with installing/maintaining that vs. C#. ARGH! All the teachers who wanted to teach C# were running into exactly the same road-block.



  • 10x = 0.999… + 9 (true by algebraic manipulation)

    No, you haven’t shown that, because you haven’t shown yet that 9x=9. Welcome to why this doesn’t prove anything. You’re presuming your result, then using it to “prove” your result.

    What we know is that the right hand side is 10 times 0.9999…, so if you want to substitute x=0.99999… into the right hand side, then the right hand side becomes 10x (or 9x+x)… which only shows what we already know - 10x=10x. Welcome to the circularity of what you’re trying to achieve. You can’t use something you haven’t yet proven, to prove something you haven’t yet proven.