David C @[email protected] @dlcmaths.bsky.social

@taliaotg Ah yes, classic Chesterton's Fence

Do we think he knows and doesn’t care or has absolutely no idea why this thing he’s upending was a thing in the first place?

@PeterMcCormack @lisakeb007 The problem is that you can't debate if you don't know anything. The same is true about critical thinking: what would you think critically about if it didn't have any knowledge?

@lisakeb007 Why do people write such dumb replies. Of course not. I'd rather they were taught skills, learned to debate, work on critical thinking.

Watching my daughter revise for her GCSEs and I privately don't give a fuck. As we enter a world of AI and automation, she is sat there memorising facts. The whole thing is stupid. We are not teaching kids the right things.

@boycereads A recent favourite is the Children of Time series - Adrian Tchaikovsky

What’s the best sci-fi you’ve ever read not named Dune, Red Rising or Sun Eater?

@amanda_spielman I strongly disagree with you on this - fluency should be prioritised, but a formula sheet allows pupils to concentrate on the problem-solving aspects of exam questions rather than tripping themselves up by accidentally switching a sign, etc. Also frees up working memory.

“Claude, how can I lower true expectations in schools while pretending that I’m maintaining standards?” I’m afraid Georgia Gould is making a terrible mistake which will have long term consequences for a generation of children.

@MarkGottlieb @dieworkwear It's definitely not...

@dieworkwear It's definitely the knot worn in British and Empire public schools. And many Catholic schools.

no one needs to learn how to tie a windsor knot. it's also not the knot that was worn in school. that would be the four-in-hand, which is why it's also known as the schoolboy knot

@HaleyCarrots Go for the original: Miss Marple m.imdb.com/title/tt173453…

My teens got super into Knives Out. Looking for more mystery films and series that lean more charming than horror. Thinking of something like Magpie Murders--a little cozy, very smart. Any recs?

@rieszspieces @girlbossmoder thepalindrome.org/p/the-camel-pr…

@girlbossmoder and add zero

fucked up how the most powerful trick in all of mathematics is "multiply by one"

@oldandrewuk ...such as the local advocacy group that collected all the complaints and pushed the agenda that led to the enquiry? What a surprise!

I hadn't even thought about the recommendations in the MVPA Review properly. The second point here is particularly bonkers.

@JimGamble_INEQE @greg_ashman Once again, deflection and evasion. It may be that you are not cut out for debates on Twitter. You have had several valid questions put to you but I have not seen any attempt to address them. You hide behind puerile behaviour and it's hard to take you seriously.

@greg_ashman lol. Your attempts to promote your substack is noted.

Censoriousness about the Mossbourne Victoria Park Academy review/inquiry conducted by Sir Alan Wood is an interesting phenomenon. Even if it had not used a novel methodology in a way it was not originally intended to be used, it would still be OK to criticise it. Nobody has broken any laws or ethical principles in doing so. If the review commissioners/authors are confident in their methods then they can choose to stay silent and let the review do the talking, or they can choose to challenge the criticism. So far, they have done a bit of both and this is all fair in a free society. And yet we see this oddly coercive approach. At one point, I was accused of having 'defamatory opinions'. Others are trying to report Tom Bennett for breaking some supposed public service principles because of his *tone*. These folks should Google Paul Graham's famous article, How to Disagree. A group named the International Campaign Against Restraint and Seclusion, a name that does not connote disinterest, posted: "A clear line was crossed when... critics asserted that safeguarding processes or reviews were being used to advance a campaign against a school... In the coming days ICARS will be formally raising this matter with the Secretary of State for Education, the Education Select Committee, Cabinet Office officials responsible for public standards, propriety, and ethics, and the Prime Minister’s Office at 10 Downing Street." The review/inquiry was sparked by reports collected by the Educating Hackney website that explicitly asks people to send in accounts of their experiences at Mossbourne schools, while making negative comments about those schools itself. That's a Campaign, not some impartial evidence collecting process. You can look it up. These comments were used in the review. Maybe their use was warranted and maybe it was not, but people are free to highlight the source. I think this points to a wider issue. Perhaps there is a good deal of groupthink and a lack of professional challenge in the public sector contexts of those involved in the review/inquiry. That might explain why they thought nobody would notice or object to the novel approach they used, and that would explain their astonishment that teachers and others in the sector might push back. It would also explain why they might feel we must be guilty of some sort of transgression for challenging them. If some of us *are* reported to the United Nations or whoever, then the Streisand Effect of that will be exquisite and they probably don't realise that, either. @woodsgolem @JimGamble_INEQE @ICARSBanRandS

@tstarkey1212 It is strange - as far as I can see, one side is engaging with the issues and asking valid procedural questions, the other is retorting with ad hominem attacks, generalities and evasion.

This kind of response, more than anything, convinces me that something weird has gone on with the report. Especially when the report is supposedly linked to safeguarding concerns. It's really, really... off.

@HarinaBassi @maths @mathsjem Another thought - check out AEA papers for nice, challenging questions on standard A Level topics

@HarinaBassi @maths @mathsjem Lots of nice things in undergroundmathematics.org or risps.co.uk - and of course the GOAT madasmaths.com

Anyone have any good challenge tasks for IAL maths Pure 1 and pure 2 please? ’ve used Dr frost but need something more challenging for my y12’s as they are very mixed group and I need to keep the top end challenged @maths @mathsjem

@IanYorston Ditto for nothing memorised. By Rolle's theorem there must be an amount of memorisation that optimises the ability to synthesise and make meaning. Any thoughts on where that might be...?

“In Borges' story, Funes the Memorious is cursed with a perfect memory: every leaf on a tree, every fleeting sensation, every trivial detail is preserved a gift that renders him incapable of thought With nothing forgotten, nothing can be abstracted, compared, or made meaningful

@colin_fraser Now ask him what it looks like in base 3

I do kind of like this guy

@justinskycak @JarrettYe Cross product to find the normal vector?

That's a perfectly valid solution method for this problem (not cheating), however it depends on being able to find the normal vector by inspection which is often not the case. In general the best way to submit feedback about content is to raise a flag. The content team has a systematic flag review process that enables them to review feedback efficiently and make changes if needed. (I don't think this question would require a change unless maybe if most/all the questions in the knowledge point can be solved that way.)

I have forgotten the method on the left. But I found a trick to get the answer quickly: just find the normal vector of the subspace and then you can get the angle θ between the vector x and the normal vector. The answer is 90° - θ. So I actually cheat Math Academy😂

@tomrocksmaths @numberphile exp(-x^2)?

NEW VIDEO @numberphile: The infamous infinite integral exp(x^2) from minus infinity to infinity. You'll likely have seen the result before, but do you know where it comes from, and how to show it's true? One of my favourite results in calculus - enjoy! youtube.com/watch?v=WiO2Ku…

@Riazi_Cafe_en x cos^3(x)

Which function is this?

@MrMetacognition RISPs for older pupils: risps.co.uk

➕ Maths Teachers ➕ Early today I was leading some training around rich Maths tasks for a group of trainee teachers. I want to be able to share with them a range of resources and websites to support them. What are your go to websites for rich tasks in the Mathematics classroom?

@BradBMath @sonukg4india That's a lovely way of doing it!

@sonukg4india If you add 100 to that list, you'll have 51 consecutive integers, whose sum must be a multiple of 3. 100 adds 1 mod 3, so without it we must be at 2.

💎

@robeastaway @AJMagicMessage ...and there it is, back again in this summer's IAL S1 paper!

It's TEN YEARS since Hannah's Sweets in Edexcel's maths GCSE paper 2 grabbed the headlines. Here's @ajmagicmessage on Sky TV: youtube.com/watch?v=cj5GDe…