Careless Mistakes on Exams With ADHD: A Pacing and Checking Routine

The exam comes back and the marks you lost were not on the hard questions. You solved part (a) and never saw part (b). You answered in centimetres when the question asked for metres. You filled in the bubble for question 23 on line 24, and every answer after it moved down a row. You knew all of it.

Careless mistakes on exams with ADHD are so consistent that calling them careless is itself a mistake. They happen at three predictable moments: while reading the question, while moving between parts, and in the last ten minutes. Each moment can be given a routine, and this post gives you one for each, plus the multiple-choice traps and a note on when extra time or a separate room is the right fix rather than more effort.

Why careless is the wrong word: attention drift, not laziness

Under time pressure, attention goes where the reward is, and the reward on an exam is solving. Reading the instruction is the dull part, so it gets read at two-thirds attention, and the brain fills in what it expected the question to be. The same thing happens at every transition: from part (a) to part (b), from scrap paper to answer sheet, from one bubble row to the next. The knowledge is intact; what slips is the small act of checking that you are doing what was asked, where it was asked.

The errors come in a short list: a misread verb, a skipped part, a wrong unit or sign, a right answer on scrap paper transcribed wrongly, a bubble out of alignment, a question answered as if it were last year's version, and a final question never reached because question three ate twenty minutes. Every one of those is a reading, transition or time problem, and none of them is fixed by knowing the material better. ADHD and working memory challenges explains why holding the instruction in mind while solving is the hard part.

Reading the question twice: underline the verb and the units

The first read is the whole question, pen down, to see its shape. The second read is with the pen, and it marks four things:

• Underline the verb. Explain, compare, calculate, sketch, list, prove, evaluate. The verb is the mark scheme. A perfect explanation of something you were asked to compare scores poorly.
• Circle every number and unit, and write the unit the answer needs in the margin before you start.
• Box the words that flip meaning: not, except, only, all, least, always.
• Count the parts and write the number in the margin: a 3 beside a question with (a), (b) and (c). At the end you will check the margin numbers against what you answered.

This takes twenty seconds a question and feels slow the first time. On an essay exam, do the equivalent by rewriting the prompt in six words at the top of your answer, so that halfway through page two you can look up and check you are still answering it.

A pacing plan written on the exam paper in minute one

Before touching question one, spend sixty seconds doing arithmetic. Total minutes, minus ten for checking, divided by total marks, gives minutes per mark. A two-hour exam worth 100 marks is 110 divided by 100: 1.1 minutes a mark. A 20-mark question gets 22 minutes.

Then write a finish time, in clock time, beside every question or section. If you started at 9:00, the first question's margin says 9:22, the next says 9:40, and so on. Clock times matter because time blindness makes elapsed time invisible but a clock can be read. A plain analogue watch on the desk is allowed in most Canadian exam rooms where phones and smartwatches are not; confirm the rule with your test centre beforehand.

The rule that goes with the plan: when the finish time arrives and the question is not done, draw a star beside it, write whatever you have, and move on. The star is a promise to return in the checking window. Many students with ADHD find that the star is the hardest part of the whole routine, because leaving a half-solved problem feels wrong, and it is also the part that rescues the last two questions.

The last ten minutes: a checking routine with a fixed order

At minute 110 you will not invent a checking method, so the method has to exist already, in a fixed order, written at the top of the paper in minute one alongside the pacing plan. Five steps, always the same:

1. Page flip. Turn every page. Every question has something written. The margin numbers match the parts answered; a 3 beside a question with two answers is a found mark.
2. Bubble sheet. Check that question 10 is on row 10, 20 on row 20, and so on to the end. Misalignment is cheap to find this way and catastrophic to miss.
3. Verb check. For each question, glance at the underlined verb and the answer. Did you do that thing? Not whether the answer is right, only whether it is the right kind of answer.
4. Units, signs, decimals and transcriptions. Compare final answers against the circled unit, and against the scrap paper where you worked them.
5. Starred questions. Whatever time is left goes here, in order of marks available.

One rule for all five: check, do not re-solve. Re-solving in the final minutes introduces new errors at exactly the moment attention is weakest, and it eats the time the other four steps need.

Multiple choice traps and the change-your-answer myth

Multiple choice punishes the two-thirds read more than any other format, because the wrong options are designed to match the question you expected. The traps are familiar: the negative stem (which of the following is not), the option that is true but answers a different question, two options that are both correct so that all of the above is the answer, and the longest, most detailed option that looks right because it is long.

Two habits help. Cover the options and answer the question from memory first, then find your answer in the list; this stops the options from steering you. And mark any answer you are unsure of with a small dot in the margin, so the checking window goes to the dots first.

Then there is the advice everyone has heard: never change your first answer. A review of decades of studies on answer changing found the opposite pattern, with changes more often going from wrong to right than from right to wrong; the myth survives because the painful changes are the ones people remember. The practical rule is to change an answer when you can say the reason (I misread the stem, I now recall the formula) and leave it alone when the reason is only a feeling. With ADHD, the feeling is often just attention wandering back to a question it already finished.

Asking for extra time or a separate room through accommodations

Everything above costs time: the double read, the pacing arithmetic, the ten-minute check. Extra time, commonly time and a half, is the accommodation that makes the routine affordable, and it is standard at Canadian colleges and universities for students registered with the accessibility office. So are a reduced-distraction room, scheduled breaks, and a computer for written exams. These are not advantages. They are the minutes the routine takes, given back.

Two things to know. First, documentation: many institutions accept a diagnosis letter from a licensed clinician for ADHD, while some ask for more; our answer pages cover what documentation is usually needed for exam accommodations and whether a diagnosis letter will work for exam accommodations. Second, booking: test centres usually require you to book each accommodated exam weeks in advance, often earlier for finals, and a missed booking deadline means writing with the class. Put the booking deadline in the calendar the day you get the course outline. Exam accommodations for ADHD in Canadian post-secondary covers what exists and how to get it.

This week: take one past exam or practice test, set a timer, and run the whole routine on it, the pacing plan, the stars and the five-step check. A routine used for the first time in a real exam is a routine you will abandon by question four; rehearsed once, it is the thing you reach for when the clock starts.