ADHD and Memorization Subjects: History, Biology, Geography

A student reads three pages of a history book. The pages end. You ask what they read, and they cannot answer.

This is not laziness. The eyes followed the lines, the pages were turned, the time passed. The only thing that was missing was the recording.

This article is about what breaks in memorization-heavy subjects and how to repair it.

Two separate difficulties

In memorization subjects, ADHD faces two different obstacles, and the two get confused.

The first is boredom. Monotonous material lowers the level of arousal. Attention works within a certain range of stimulation; when it falls below that range, the mind starts producing its own stimulus. A history chronology or biology terminology produces exactly this drop.

The second is the encoding problem. This one is sneakier. If attention is not on the text while reading, the information never enters memory. Afterward people say "I forgot," but to forget you must first have recorded it.

I wrote about this distinction in the working memory article. In memorization subjects the two feed each other: boredom lowers attention, when attention drops nothing registers, and when nothing registers the feeling of progress disappears and boredom grows.

The familiarity trap

This is the biggest mistake in memorization study. Everyone has it, and in ADHD it costs more.

When you read a text a second time, it feels familiar. Familiarity gives the feeling of knowing. You close the book and say "this topic is done."

In the exam, when you look at the blank page, nothing comes.

Research shows this difference clearly: rereading a text is among the least efficient of the study methods that have been tested. Recalling information from memory is among the most efficient.

The difference is this: reading teaches you to recognize the information, not to recall it. The exam asks for recall.

In ADHD this trap runs deeper, because reading is a passive job, and in a passive job it is hard to notice that attention has left. Three pages get read, a feeling of progress forms, and the recording was never made.

Two methods with evidence

A broad review singles out two of ten tested methods by a wide margin.

Testing yourself. Recalling the information from memory. Book closed, paper in front of you.

Spaced repetition. Spreading the same amount of time over days instead of piling it into a single sitting.

Most of the other popular methods, including underlining and making summaries, are found to be low in efficiency. This sounds surprising, but the reason is clear: both are passive and both produce familiarity.

On the ADHD side these two methods have an extra advantage. Testing yourself is an active job; it demands constant small decisions, and those decisions hold attention. It is the opposite of passive reading.

The real hard part: the calendar

Knowing the method is not enough, and this is exactly where people get stuck in ADHD.

Spaced repetition needs a calendar. You have to remember which topic to review when. This requires prospective memory, and as I wrote in the forgetfulness article, this is exactly the area that is hardest.

The solution is not to leave the decision to the review day.

When a topic is finished, the review days are written into the calendar at the same moment. The topic is done, three days later and ten days later are marked at once. The decision is made then.

It is also possible to hand this over to an app, and for most people that works better. But there is a risk here: looking for a new app can become a form of procrastination in itself. I wrote about this in the app hunting article.

Subjects are not studied the same way

When people say memorization subject, they put them all in the same pot. But the structure of the information is different, and studying in a way that suits that structure makes the job markedly easier.

Subject	Structure of the information	What to attach it to	What does not work
History	Events and causes	Narrative: who, why, what happened next	Memorizing dates as a flat list
Biology	Systems and processes	Diagram: how the parts connect to each other	Memorizing terms one by one
Geography	A chain of causation	Map and cause-effect	Reciting region names in order
Literature	Matching periods and works	The general character of the period	Memorizing work titles without authors

The common point is this: a raw list does not stick in memory; information attached to a structure does.

In ADHD this is even more decisive. A meaningless list is the form of information that lowers arousal fastest. When the same information is attached to a story or a diagram, it is both held more easily and less boring.

History: attach it to a narrative

The most common mistake in history is memorizing dates and events separately.

History is not a list of events but a chain of causation. Why an event happened, what came out of it, how it prepared the next.

Once the chain is built, most of the dates fall into place on their own, because the order becomes clear. Dates memorized one by one get mixed up with each other.

A practical method: after reading a period, close the book and write that period as if telling it to someone. The place where you get stuck while writing is the place you do not know. The book is opened at that point.

This is also the most natural form of testing yourself.

Biology: attach it to a diagram

In biology the information is hierarchical: systems, organs, cells, molecules.

When read as text, this hierarchy disappears. When it is drawn as a diagram, it becomes visible.

There is an advantage here: drawing a diagram is an active job, and in ADHD active work holds far better than passive reading. Also, visual information is easier to remember than text alone.

A practical method: reduce each topic to a diagram that fits on a single page. If the page is full, there is too much detail; it needs simplifying.

Review is also done through this diagram: redrawing the diagram on a blank sheet. The box you cannot draw is the box you do not know.

Geography: attach it to a map

In geography most information is related to place, and when it is cut loose from place it turns into a random list to memorize.

A climate feature depends on where it is. An agricultural product depends on climate. Population distribution depends on both.

Once this chain is built, there is less to memorize, because much of the information can be derived.

A practical method: work on a blank map. First the regions, then the climate, then the products. Each layer sits on top of the previous one.

The card system

Cards are the most recommended tool in memorization subjects, and in ADHD they have two faces.

The good side: the card directly forces you to test yourself. The question is on the front, the answer on the back; the familiarity trap is disabled.

The bad side: making cards is a separate job. Many students stay stuck at making cards and never study. Making cards gives the feeling of working; this is the paper version of app hunting.

The solution is to make the card while reading, not afterward. While the topic is being read, the card is written the moment an important piece of information is seen. That way two jobs are finished in one go, and making cards does not turn into a separate task.

The second rule: the card must be short. One piece of information per card. A long card makes it impossible to remember the answer.

Session length

In memorization study the long session does not work, and in ADHD it does not work at all.

The reason is the level of arousal. Continuing with the same kind of information after forty minutes creates a zone where attention has dropped and recording has stopped. The time spent in that zone counts as studied but does not count as learned.

The setup that works is a short session and a change of topic. Twenty minutes of history, a short break, twenty minutes of biology. The change produces novelty, and novelty refreshes attention.

There is a balance here: switching subjects produces a transition cost, which I wrote about in the difficulty with transitions article. But in memorization subjects the cost of boredom is higher than the cost of switching. In numerical subjects the balance reverses.

Audio material and movement

There are two additional methods, and the limit of both should be known.

Reading aloud. Reading a text aloud is retained better than reading silently, because a second channel comes into play. Hearing your own voice also makes it easier to notice that attention has left.

Reviewing while walking. For some people movement keeps the level of arousal up, and memorization review can be done while walking. I wrote about the effect of movement on attention in the exercise article.

The limit common to both is this: they work not for learning new information but for refreshing information already known. Research shows that both listening to and reading the same text is better than listening alone; I covered this in the audiobook article.

What to do when you are bored

This is the unavoidable moment of memorization subjects, and it is usually handled wrongly.

The common reaction is to force it: I am bored but I will continue. This lengthens the time spent in the zone where attention has dropped, and recording has already stopped.

The second common reaction is to quit: picking up the phone, moving to something else. This also ends the session.

The third way, which works, is to change the method. Moving from reading to writing, moving to a diagram, moving to explaining aloud. The topic stays the same, the stimulation is refreshed.

This is the artificial addition to study of one of the four triggers I described in the motivation article: novelty.

The final review period

In the last weeks before the exam, what to do is review, not new topics.

The most common mistake here is rereading for review. Reading the book from the start in the last week neither takes time nor gives information.

The correct review goes like this: write the topic headings on a blank sheet, pour what you remember under each heading, then compare with the book. The gaps appear in this comparison, and that is exactly where the studying should go.

This method feels hard, because the blank paper is uncomfortable. That is exactly why it works: the discomfort is the sign of the effort to recall the information.

Memory techniques: how well do they work

Acrostics, the method of loci, visualization. These techniques are talked about a lot in memorization subjects, and the state of the evidence is mixed.

In short: they really work for certain kinds of information, and they are not a general solution.

Where they work well is short lists that have an order. An abbreviation made to hold a ranking, a group or steps is remembered more easily than a raw list.

Where they work badly is information that needs meaning. You cannot hold the cause of an event with an acrostic; a cause is held by understanding.

In ADHD there is an extra warning: producing the technique can itself turn into a form of procrastination. Spending forty minutes looking for a nice abbreviation gives the feeling of working, and that time does not go to the subject.

The rule: producing a technique does not go past five minutes. If it does, that information will be held by repetition, not by the technique.

The right form of making a summary

Despite its popularity, making a summary is counted among the low-efficiency methods, and the reason is this: most summaries amount to copying the text.

A copied summary produces familiarity, not recall.

The summary form that works is different: it is written with the book closed.

The method goes like this. The topic is read, the book is closed, what is remembered is poured onto a blank sheet. Then the book is opened and the gaps are filled in, but in a different color.

Everything written in the second color is what you did not know. Review is done by looking at that color.

This method produces a summary and does the job of testing yourself at the same time. In ADHD it also holds attention because it is active.

Explaining it to someone

This is the strongest and least used method in memorization subjects.

Explaining a topic to someone forces you to recall the information from memory. Moreover, where you get stuck while explaining becomes clear at once, which means something you would have discovered in the exam is discovered weeks earlier.

If there is nobody to listen, explaining aloud also works. Recording it on the phone is even better: while listening to the recording, the gaps can be heard.

On the ADHD side there is a second benefit: explaining is a social and active job, so it raises the level of arousal. It is the exact opposite of monotonous reading.

Taking turns explaining topics with a friend you study with provides both this and the body doubling effect at once.

How to set up a review calendar

Since the calendar is where spaced repetition gets stuck most, let me give a concrete example.

Review	When	What is done	Duration
1st review	Same day, in the evening	Book closed, recalling from the headings	10 minutes
2nd review	3 days later	Cards or a blank sheet	10 minutes
3rd review	10 days later	By solving questions	20 minutes
4th review	1 month later	Only what is still missing	10 minutes

The intervals do not have to be exact; what matters is reviewing at increasing intervals.

The critical rule: these four dates are written into the calendar on the day the topic is finished. The decision is not made on the review day, it is made when the topic is finished.

In ADHD this single change is the difference between spaced repetition being doable and not being doable.

Which information should be memorized

Most students never ask this question, and when it is asked, the volume to be studied drops markedly.

Not all information is information to be memorized. It divides in two.

Derivable information. Things that can be worked out once you know a rule. In geography, once the climate is known, the product can be derived; in biology, once the system is known, the function can be worked out.

Raw information. Things that cannot be derived and simply have to be known. Dates, names, terms.

Memorization is applied only to the second group. Approaching the first group with memorization both inflates the volume and makes the information brittle.

In ADHD this distinction matters especially, because raw information is monotonous and monotonous information is the thing that bores fastest. When you shrink the volume, the time spent bored shortens too.

The last day before the exam

What to do on the last day is not a new topic but a round of reminding.

The method: write the topic headings on a blank sheet and pour what you remember under each heading. A heading you cannot write is the place to look that day.

What should not be done is reading the book from the start. Reading on the last day neither gets finished, nor gives information, and because it does not get finished it produces anxiety.

The second thing not to do is to look at a new source that day. A new source always shows what is missing, and on the last day this is information that does not help.

Sleep is also part of this day. That sleep loss is negatively associated with learning and performance is well documented; I covered it in the exam morning article.

What is left for me

The diagnosis a student who struggles in memorization subjects gives themselves is often the same: I am lazy.

Struggling in math is easy to understand; it is a hard subject. Reading history does not look like a hard job. So the only explanation for reading three pages and remembering nothing feels like character.

The conclusion I reached while writing this article is that this explanation is most probably wrong. What is read is not forgotten; most of the time it was never recorded. The eyes are on the line, attention is elsewhere, and nobody tells you that the two can happen at the same time.

The way out is in the method: closing the book and writing on a blank sheet. On the first try the page may stay empty to the point of embarrassment. What teaches is that emptiness.

The information here is a general framework. Decisions about diagnosis and treatment are made with your doctor.