[warmly] Welcome to the show. Colin, I wanna start with a kid I can see RIGHT now: worksheet out, pencil in hand, twenty minutes gone, and he has written... his name. That's it. Not because he's lazy, not because he doesn't care -- it's that blank-page freeze. The "I don't know what to do FIRST" moment that eats the whole lesson. [calm] The "written his name" detail is painfully specific, because every teacher knows that scene. The tragedy is, once step one becomes the obstacle, the pupil never even reaches step four or five -- the bit you may actually want to assess. Exactly. And that's why I was so interested in this piece by Melanie Meehan in Cult of Pedagogy -- the article is called "How to Use Backward Chaining to Differentiate Instruction," published June 28, 2025. And when I first read the phrase backward chaining, I had a tiny allergic reaction, because it sounds like one of those workshop terms somebody prints on glossy cardstock. [skeptical] But then I got into it and thought, oh -- no, this is actually about a very real classroom problem. [deadpan] Sensible teachers do tend to develop a rash around glossy cardstock. But the source matters here. Meehan's borrowing the term from behavior analysis, where the idea is that if a skill has multiple steps -- a chain -- you teach it by having the learner master the FINAL step first. Wait -- the final step first. That's the part that made me stop. Because in class we're usually so obsessed with sequence. Step one, then step two, then step three. And Meehan's point is almost the reverse: if the whole task is too much, you pre-fill the earlier steps and let the student do the LAST chunk independently, so they can experience a finished product on day one. [questioning tone] And "day one" is the key phrase there. Not eventually, not after six failed attempts -- day one. The learner gets the psychological experience of completion, which is rather different from spending forty minutes marinating in confusion. [laughs softly] "Marinating in confusion" is, honestly, middle school in a sentence. But yes. If I hand a student an untouched writing task and they stall at the opening sentence, they feel like they can't write. If I give them the setup and ask them to do the ending, suddenly they have a completed piece in front of them with THEIR own work in it. That changes the story they're telling themselves. And we should plant the tension here, because some listeners will hear "pre-fill steps" and think, ah, so we've lowered the bar. But Meehan is very clear: this is not a separate track and it's not meant to stay in place. It's a scaffold designed to DISAPPEAR once the pupil can handle more of the chain. Yes -- thank you. Because if you've taught long enough, you've seen that fear. "If I support too much, am I babying them?" And I get that. But there is a big difference between changing the GOAL and changing the ENTRY POINT. Backward chaining doesn't say the student never does the full task. It says: right now, let's not let the first stuck point block access to everything after it. [reflective] That's nicely put -- changing the entry point, not the destination. Or, if you'll allow me one science-teacher image, it's the lab version of not making a child build the Bunsen burner before they can do the experiment. If the burner assembly is the bottleneck, you may never see whether they understand the chemistry. [chuckles] See, and that's why ex-chemistry teachers are useful at parties. But that bottleneck idea matters. Because teachers sometimes look at a student who can't begin and think the whole task is beyond them. And sometimes... no. They can DO the ending. They just can't get themselves launched. [curious] So let me put a research frame around Meehan's classroom instinct. Her line is essentially: skip some of the early steps in order to experience the later ones. That maps quite neatly onto John Sweller's cognitive load theory, and specifically the worked-example effect. In plain English: a partially completed model reduces the amount of stuff a learner must hold in working memory all at once. [questioning tone] Grab "worked-example effect" for me. Because that's one of those phrases that can sound very impressive and also, if we're honest, a little slippery. Fair. A worked example is just a model where some or all of the process is already done. The effect is that novices learn better from that than from being told, "Off you go, solve the whole thing from scratch." And the reason is not magic. Working memory is limited. If a student is spending all of it on "What am I supposed to do first?" there's precious little left for the actual target skill. So the bottleneck isn't effort -- it's where the effort is getting spent. Precisely. If they're stuck on step one, they never reach step five. Backward chaining shifts their mental energy to the part you actually want them to practice instead of the part that's blocking the doorway. That lands for me with writing. [matter-of-fact] A fourth-grader who can't generate a narrative idea from thin air may get labeled "bad at writing." But Meehan's example is much more humane than that. Instead of saying, invent a story from nothing, you give that child three pictures showing a basic sequence of events, and they write the story OF those pictures. The "three pictures" detail is doing real work there. It means the invention step has been reduced, but the composing step remains. The pupil still has to turn sequence into language, which is a different cognitive demand. Right. They're not off the hook. They still have to decide what happened, add words, maybe transitions, maybe feeling, maybe dialogue depending on the assignment. But they are not drowning in that first terrifying question: "What should my story even BE?" And this is where I think the interpretation matters. Some people treat independence as "no support from the start." I don't think that's independence; I think that's often abandonment with good branding. [dryly] Which, to be honest, education has far too much of. [laughs] "Abandonment with good branding" -- put that on the glossy cardstock. But yes. I agree, mostly. The only caution I'd add from the classroom side is that scaffolds can get sticky. If we're not careful, the modified version becomes the permanent version, and then we really HAVE lowered the bar. That's exactly the fade-out point. The support is temporary by design. You remove one scaffold at a time until the learner can do the full chain. So maybe on Monday they only do the last chunk. On Wednesday they do the last two chunks. Later, they handle the entire sequence independently. The easier version is not the destination; it's the bridge. And the teacher move there is subtle. You have to watch closely enough to know which part of the chain is now safe to hand back. That's the part no article can automate for you. It's judgment. It's, "Okay, you can do the ending now. Next time, you're also gonna handle the middle." And when you get that right, a kid who used to freeze at the blank page starts to think, maybe I'm a person who CAN do this. [softly] Which is the deeper shift, isn't it? Not merely that the assignment gets finished, but that completion arrives early enough to change identity. The child doesn't just practise a task; they experience themselves as someone capable of finishing one. [reflective] Yeah. And once a student has felt that -- really felt it, with their own words on the page -- the blank page is still hard, but it isn't quite so powerful. That's the part I'd keep from Meehan's piece. Start at the end if you have to. Just don't stay there. [warmly] That's the episode. Thanks for listening.
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