Christian Bokhove Profile picture
Professor in Mathematics Education, Director of Research SEdS at UoS, @MASEsoton, TIMSS+PISA, Research Methods, R, School Mathematics Project 2.0
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Sep 7, 2021 10 tweets 3 min read
We've known it because unfortunately this is not really a 'new study' (maybe a few small changes) but yet another re-analysis of PISA 2012. All countries were already included by Caro et al. (2015) researchgate.net/publication/28… - also PISA 2015 sliced and diced to death. So, we are talking about the same source and there's much to say about the scales (the casual way in which the paper equates scales reminds me of papers that declare inquiry, PBL, student-orientation all the same, when they're not).
Sep 5, 2021 4 tweets 1 min read
There have been quite a few people who did not seem up-to-date with decades of literature around online and blendec learning, but feel expert because of online learning during the pandemic. And it’s not that it isn’t worthwhile to keep on studying the determinants of effective learning, it’s just that my sense is that there is a lot of reinventing the wheel. Take some of the OU stuff from ages ago with quizzes and more open answers….
Aug 19, 2021 5 tweets 1 min read
When on edutwitter some people don't want to talk about terminology, it isn't always because they have a good eye for 'obfuscation' and 'relevance', but because they need a 'persuasive definition' for their semantic sophistry. Take the recent inquiry/explicit convos. For inquiry you need to be able to bunch all criticism together, so you can use it all interchangeably, and paint a field that uniformly fails.
Jun 27, 2021 69 tweets 15 min read
Reading the Ofsted maths review a bit more. I really think the categorisation of knowledge is very limited with declarative, procedural and conditional knowledge. The latter is not used a lot afaik but is metacognitive and strategic in nature (but metacognition not mentioned). With Rittle-Johnson et al’s (and others) work on procedural and conceptual knowledge, I especially find the omission or rephrasing of ‘conceptual’ notable. The word ‘conceptual’ appears in sevral places….
Oct 8, 2020 37 tweets 9 min read
Ok, some thoughts on E.D.Hirsch’s latest book. To be honest, I’ve seen/heard 4 or 5 interviews with him so some of that might be mixed in. Let me begin by saying that it’s quite clear that a desire for social justice really drives Hirsch. I seems passionate in both audio and writing. Several people, including himself, gave called this (last) book his most pronounced.
Oct 5, 2020 10 tweets 2 min read
When people discuss CLT effects I seldom hear them mention that Sweller et al. (2019) themselves call some 'compound effects', which he imo rather vaguely calls them 'not a simple effect' but 'an effect that alters the characteristics of other cognitive load effects' (p. 276). Interestingly, compound effects 'frequently indicate the limits of other load effects.'. In other words, in some contexts effects that might be relevant, are not relevant any more because of such effects.
Sep 24, 2020 16 tweets 4 min read
I've been working on a project that is a bit niche. It's not finished yet as I have to finish other stuff, but it tries to tap into the iconic status of the Countdown show. It is running since 1982 en.wikipedia.org/wiki/Countdown… A show typically has letter/word rounds (I'm less interested in those) and number rounds (yes!). EVen from when I was young - in the Netherlands we had a variant called 'cijfers and letters'- I have been intrigued by solution processes.
Sep 24, 2020 10 tweets 2 min read
I find it quite difficult to explain this but I’ll keep on trying. It’s about the condtant change in how ‘knowledge’ is meant, as in certain specific knowledge is good for knowing thst dpecifuc knowledge, versus general claims about knowledge. The tweet was about transfer of course but quite often those commenting on transfer combine it with the domain-specificity of knowledge. Take chess. De Groot, Herbert, Simon... or Leslie and Recht’s baseball study....take-away: knowledge matters...
Sep 20, 2020 7 tweets 2 min read
Let me cite some issues from this paper....

(I know some will keep on insisting that it 'at least is better than not having it all' but I would argue this really depends on what you're looking at. Often it's a trade-off with other things.) Of course the paper is medicine oriented but given that some like to make that comparison any way... In social science there often are even more challenging limitations. But the 'randomisation' points here also apply....
Sep 20, 2020 6 tweets 2 min read
There are loads of things that matter in good research. There is an assumption that if one of the ‘gold standards’ criteria isn’t met, it can’t be good research. I would rather say that it just has a limitation. It would not be good to think b/w here. What some also seem to forget is that all those criteria matter. So, it’s great you randomised participants but if your measurement is bad....it’s still bad. Or if your comparison groups are poorly chosen....still poor.
Sep 17, 2020 14 tweets 3 min read
Disappointed with this article. It just repeats what’s already known but with some added ambiguous wording -> Cognitive-Load Theory: Methods to Manage Working Memory Load in the Learning of Complex Tasks journals.sagepub.com/doi/full/10.11… First the abstract. ‘Productive’ and ‘unproductive’ cognitive load seem the new faboured terms. Reminds me of ‘deliberate’ in ‘deliberate practice’. It’s tautological. Who would want ‘unproductive load’. When is it ‘unproductive’ any way?
Sep 17, 2020 4 tweets 1 min read
Fair point about terminology. Some more examples: scales like those in PISA teacher-directed instruction, inquiry. Or here 50 frequently confused term pairs in psychology frontiersin.org/articles/10.33…
-> Humpty Dumptyisms gregashman.wordpress.com/2020/09/17/hum… “In particular, the ‘methods’ sections of such papers are vital because they demonstrate exactly what was measured, rather than what the researchers chose these measures to mean.”
Sep 8, 2020 4 tweets 2 min read
Interesting spread of salaries from Education at a Glance 2020. Image Also the school head ones. Image
Sep 8, 2020 7 tweets 1 min read
I’m reading ‘Cynical Theories’. I haven’t kept up-to-date with all the available ideologies, and only read the introduction, but I find some of the ‘labels’ like liberalism and postmodernism quite contentious. But I’ll read on, might become clearer. “Liberalism is thus best thought of as a shared common ground, providing a framework for conflict resolution....”

“on our furthest left, not only advance their cause through revolutionary aims that openly reject liberalism as a form of oppression”
Sep 6, 2020 17 tweets 5 min read
This blog has some ok points (teacher voice, of course, a good thing) but in some key areas it uses some ambiguous wording and links to exaggerate the situation -> Teachers on the Edge teachingbattleground.wordpress.com/2020/09/06/tea… Let me first start with the recommendations. Point 2 re CPD is good, this has been the case in the Netherlands for some time. Point 3 seems right to me; it’s good to let frontline teachers have a say. However, wonder whether really means all teachers. Will come back to that.
Sep 1, 2020 6 tweets 1 min read
In my experience, those dismissing clarity of terminology sometimes do this for opportunist reasons: they need the lack of clarity to set the terms of the discussion, for example with a biased use of words. Can often revognise them by their statements that the meaning of terms is ‘obvious’ without explaining what is meant. Some sort of ‘folk understanding’ of it or a very generic, ‘truthy’ statement like ‘all humans need order’.
Aug 28, 2020 17 tweets 5 min read
I know I can’t expect everyone to studiously analyse every graph they encounter, but if you make a big claim, I think you should. The fact that not many seem to ask themselves what the provenance of Hirsch’s data for this graph is, is worrisome.
bokhove.net/2017/04/26/the… Image In the blog I use my basic knowledge of French (exam when I was 17) to decipher the source data: education.gouv.fr/les-performanc…
Aug 23, 2020 12 tweets 3 min read
Interesting article, although I disagree with some of the observations -> Populism, Twitter and how to be a social media academic by @DrNomyn link.medium.com/AOUBLrSv68 @DrNomyn Firstly, I do very much like how the kerfuffle led to an immense Altmetric increase. This is a new social media reality; a reality that says any attention is good attention.
Aug 17, 2020 7 tweets 2 min read
This is a pertinent tweet.
I have been very surprised the grade boundaries the last three years for maths have been so different, purportedly because of differing exam difficulty? Should be much more stable. Last three years maths Gcse in a tweet. See how low the boundary is but also how it fluctuates.
Aug 10, 2020 4 tweets 1 min read
There is a disconnect when you talk about needing robust research with representative samples and generalisable designs.... and then take individual articles or even tweets to talk about academia 'in general'. Sure, some mask this by not including a quantifier. If you have encountered some instances of what you consider poor behaviour or outputs, please use the quantifier it deserves: 'some' or even 'a few'.
Aug 9, 2020 5 tweets 2 min read
Years ago this used to be my objection to others arguing, for example, that I had to do a whole review of available research. Not a book title, but the whole shebang. Sure @suzyg001 recognises this from blog comments as well. Glad opinions change. Wow, these discussions go back even to 2014 (probably further but quick search). Someone would give opinion with some references.other would disagree and argue that more complex *with references* and then the first person would keep on asking to spell out that evidence.