Two Fun Facts About Working Memory That Every Academic Coach Should Know Before Finals
Last weekend, I spent some time with a group of math educators at an online summit. I was teaching them our “Cognitive Load Mini-Lecture”—a framework we use in the Anti-Boring Learning Lab to help students understand that "shutting down" isn't a character flaw; it’s a biological limit.
During the session, I shared two specific points about working memory that piqued teachers’ curiosity:
First: Working memory is one of the strongest predictors of academic success we have (often more so than IQ).
Second: The number of "parking spaces" in our working memory is fixed. It’s not possible to increase your working memory capacity.
A few educators were surprised by these points and asked for the research behind them, and I promised to follow up. This post is that follow-up (welcome to my blog, Building Math Minds educators!! I hope this post will address your questions).
Because I’ve recently been preparing for our upcoming Finals Without Freakout Masterclass (March 24! Woot! Woot!) — these two “fun facts” are hugely relevant as we think about how to help students prepare for exams of any kind (not just math) — both the regular unit exams as well as the dreaded final.
Whether a student is navigating a multi-step calculus problem or synthesizing a semester’s worth of history notes, working memory limitations are the 'invisible hand' behind almost every finals week meltdown.
There truly is no better time to refresh our understanding of how working memory works—and more importantly, how to teach our students to work with it rather than against it.
After all, finals are just far enough away to feel manageable, but close enough that the science and strategies you teach your students now will actually stick when the pressure rises.
Let’s get into it!!
TL;DR
If you don’t have time to read our full article, here are the top three points I want you to walk away with:
Capacity is Fixed: We cannot "exercise" our way to a larger working memory. Brute-force practice is the least efficient way to learn; peak performance happens when we stop trying to grow the "lot" and start mastering the "traffic maneuvers."
Strategy is the Competitive Advantage: Direct strategy instruction (like the tools in our Masterclass) has been shown to help students reach peak performance 20x faster than repetitive practice alone.
A Hopeful Predictor: Working memory is a stronger predictor of academic success than IQ. This is great news for coaches because while IQ is fixed, is highly teachable—allowing a student's natural intelligence to finally shine through the "logistical jam."
The bottom line: We teach these strategies now (in March and April) so they become automatic by May. When the "parking lot" is full during finals, your student shouldn't be wasting space on how to study; they should be using every spot to solve the problems in front of them.
This post may resonate most with:
academic coaches and executive function coaches preparing students for finals season
ADHD coaches and neurodivergent-affirming practitioners whose students experience cognitive overload as a recurring pattern
tutors and coach training programs looking to ground study strategy work in learning science
teachers and educators curious about the cognitive science behind effective study strategies
And now, let’s explore all this in detail.
What Working Memory Actually Is (And Why It Matters for Academic and Executive Function Coaching)
Before we get to the fun facts and the research, let’s get grounded in what working memory actually is. It’s a term that is getting used more and more as “executive functions” have their moment, but it's often misunderstood.
Working memory is the brain's active processing space. It's where you hold information for a few seconds while you do something with it. Think of it as the "workspace" where you juggle data before it either disappears or gets encoded into your long-term memory "filing cabinet."
Here is what that looks like in practice:
In the classroom: When a student reads a word problem and holds the numbers in mind while figuring out the operation.
While studying: When a student reviews their notes and tries to categorize biology terms into a Venn diagram—holding the definition of "mitosis" in mind while simultaneously comparing it to "meiosis" to decide where the overlap goes.
In a coaching session: When an executive function coach listens to a student describe their weekend, holds the three main tasks mentioned in their head, and mentally re-orders them by priority before speaking.
In sum: Working memory is NOT where we store things; it’s where we actively hold and manipulate information as we are thinking.
Note: If you've never seen our Anti-Boring Mini-Lecture on Cognitive Overload, I walk through this using the "parking spaces" framework. It's free in our visitor library and is a great tool to share directly with students to help them visualize this "workspace."
With that definition in mind, let’s turn our attention to the “fun facts”:
Fun Fact #1: Working Memory is Fixed; You Can’t Grow It.
When I’m teaching the Cognitive Load Mini-Lecture, I like to joke that I have some good news and some bad news.
The good news? Long-term memory is technically unlimited. If we think of long-term memory like a massive, infinite parking lot, you can park an unlimited number of "knowledge cars" there.
The bad news? Working memory is extremely limited—biologically constrained, in fact. Most people can only "park" around 3–4 discrete items in working memory at a time. (While George Miller's famous early estimate was "7, plus or minus 2," later research has revised this down considerably.)
Researchers sometimes describe working memory as a mental whiteboard with a fixed surface area: you can't write more on it than it can hold, and you can't make it bigger. When teaching students, however, in the Learning Lab we’ve found the "Parking Lot" metaphor even more effective: while long-term memory has unlimited spots, the working memory parking lot only has 3 or 4.
It feels like a cruel “plot twist” of the universe to design a brain that can remember a lifetime of information, yet requires everything to pass through such a tiny bottleneck.
Adults have a few more spaces than children, but once we reach adulthood, the lot is the lot. (And for many neurodivergent brains, those parking spots can feel even more limited or harder to access).
So, is that it? Are we just stuck with the capacity we were born with?
It seems counterintuitive that we can't "build the muscle" of working memory with enough effort and practice. But the research is clear.
A 2021 study by Malinovitch, Jakoby, and Ahissar at Hebrew University wanted to settle this exact debate: Does practicing a working memory task actually expand your mental "parking lot," or are you just getting better at "parking"?
The Setup:
The researchers used a common brain-testing tool called the "n-back" task. Think of it like a high-speed game of "Simon Says" where you have to remember not just the current shape, but also the one that appeared several steps ago, all while new shapes keep coming at you. It’s a notorious "parking lot" jammer. They compared two groups:
Group A (Strategy): These participants were given direct instruction on a specific "mental shortcut." Instead of trying to juggle every single shape in their head, they were taught a systematic way to focus on just one "slot" at a time.
Group B (Repetitive Practice): These participants were given no help. They just did the task over and over for 40 sessions (intensive "brain training").
The Key Findings:
Speed of Learning: The group that was taught the strategy reached peak performance in just 2 sessions. The practice-only group took 40 sessions to get to the same spot. Wowser!!
The "Aha!" Moment: When they interviewed the practice-only group, they found that the only people who improved were the ones who had spontaneously discovered the same strategy on their own. The people who didn't improve were still using "brute force" (trying to expand their capacity), which failed.
The "Fixed" Capacity: By using computational modeling, the researchers showed that the participants' actual biological capacity (the number of items they could hold) never changed. Even the top performers were still working with the same small "parking lot"—they just became world-class at managing the traffic.
What this means for coaching student at exam time:
This study proves that "trying harder" or "doing more practice problems" is the least efficient way to improve. If a student's working memory is full, they can't "muscle" their way to more space.
Students who are told to "study more" for finals without being taught how to study differently are being sent back to the parking lot to drive in circles. More laps don't create more spaces. A better parking strategy does.
But here is the catch: You can’t teach a new parking strategy while the lot is already full and everyone is honking.
If we wait until finals week to give students these tools, we are actually adding to their cognitive load. We are asking them to learn a new "maneuver" at the exact moment their working memory is most taxed.
This is why we prioritize our Finals Without Freakout Masterclass and Toolkit weeks before exams begin. The goal is automaticity. When a student practices these strategies in March and April, they become second nature. By the time the high-stakes exam arrives in May, they aren't wasting limited working memory on how to study—they are using it to solve the problems in front of them.
Bridging the gap between 'knowing' a strategy and 'automatically using' it under pressure is exactly what coach training in learning science is designed to address."
Fun Fact #2: Working Memory Is a Stronger Predictor of Academic Success Than IQ
This one tends to stop people—it certainly stopped me! For decades, we’ve treated IQ (or standardized tests) as the primary measure of academic potential. The research complicates that picture considerably.
In one powerhouse study (Alloway & Alloway, 2010), researchers followed children from age 5 to 11, measuring both IQ and working memory.
Six years later, the results were clear: Working memory at age 5 was a significantly stronger predictor of literacy and numeracy outcomes than IQ. It isn’t just a proxy for intelligence; it is a distinct cognitive skill.
Why this is Great News for Coaches:
While this might sound daunting, it’s actually incredibly hopeful because of one key difference: IQ is largely fixed, but working memory management is highly responsive to strategy.
The Power of Intervention: We can’t grow the "parking lot," but we can dramatically improve how a student organizes it and what they choose to "offload."
The Impact for Neurodivergent Students: Students with ADHD often have "parking lots" already taxed by the effort of managing attention or sensory input.
The Competitive Advantage: Because working memory is so strategy-dependent, these students have the most to gain from learning-science-backed tools.
When we teach a student how to "offload" logistical noise, we aren't just giving them a study tip—we are effectively clearing the jam in their parking lot so their natural intelligence can finally shine through.
Every Test Is a Parking Lot Challenge — And Finals Are the Biggest One
These two “fun facts” and corresponding research studies explain exactly why "smart" students—and especially our neurodivergent students—often hit a wall during finals.
They may have the IQ to understand the material, but they lack the working memory strategies to juggle three months of content simultaneously. For students with ADHD, the "parking lot" is often already taxed by the extra cognitive demands of managing attention and sensory input. By the time they sit down to study, their parking spaces are full before they even open the textbook.
Every test puts pressure on working memory, but finals amplify that pressure across three dimensions at once:
The Content: Synthesizing large amounts of complex information.
The Logistics: Tracking deadlines, materials, and exam schedules.
The Pressure: Managing the "honking" of test anxiety and high stakes.
The research points to a clear implication: strategy instruction works dramatically faster than brute-force practice, and it works across all three dimensions of overload.
This is why we don't wait for the "system crash" in May. We start building the efficiency strategies now, while there is still room to breathe.
Active retrieval and encoding strategies ensure that information actually makes it into the long-term "filing cabinet" instead of just clogging up the "parking lot."
Reliable task management systems free up the mental space that would otherwise be consumed by logistical noise and "what do I do next?" anxiety.
Regulating the stress response protects the cognitive resources a student needs to access their knowledge when it counts.
You don’t need a dedicated "Finals Prep" module starting this afternoon. You simply need to notice which strategies your students already have and which ones are missing—and introduce those missing pieces now, in low-pressure moments.
The students who walk into finals season with working systems already in place aren't necessarily the ones who studied the hardest. They're the ones who learned better strategies early and had enough practice to use them automatically when the pressure was on. That’s what the research describes—and that’s exactly what we’re building toward.
The Coach’s "Secret Weapon"
There’s a hidden layer to this research that we often forget: You cannot effectively teach a "parking strategy" that you aren't using yourself.
As coaches, our own working memory is often the first thing to redline. Between managing client notes, tracking student progress, and running a business, our "mental whiteboards" are constantly at capacity.
The strategies we teach—from active retrieval to cognitive offloading—aren't just for the students. They are the professional tools that allow us to show up with the calm, regulated presence our students need.
When your systems are automatic, you have the "parking space" available to truly listen, observe, and coach.
Ready to Turn Finals Freakout to Finals Flow?
If you want to move beyond the theory and start building these "parking strategies" with your students, we have a few ways to support you:
The Finals Without Freakout Masterclass (March 24, 2026): This is our flagship, research-backed session designed to give you a concrete framework for guiding students through exam season without the crisis. Click here to learn more about the masterclass.
Free Office Hours (March 17 at 4:30pm PT): Not sure if the Masterclass is right for you? Join me for a casual Q&A session where we’ll talk about what the toolkit covers and how to apply it to your specific students. Click here to sign up for our free office hours.
The Anti-Boring Learning Lab: Reading this after the live dates? Never fear. We keep recordings of our masterclasses and the complete Toolkits inside the Lab. You can join anytime and get instant access to the strategies we discussed today. Click here to learn more about the courses in the lab.
If you're just getting started, our Visitor Library also has the original "Cognitive Overload" mini-lecture available for free. You can find that at antiboringlearninglab.com/resources.