After reviewing thousands of NAPLAN practice responses, the same errors appear again and again across year levels and subjects. These are not random mistakes. They are systematic patterns that, once identified and understood, can be eliminated. Here are the 10 most common NAPLAN mistakes and exactly what to do about each one.
Literacy mistakes
Mistake 1: Answering what the passage says instead of what the question asks
The most common NAPLAN Literacy error. A student reads a passage, the question asks “why did the author choose to end the story this way?”, and the student picks the answer that describes what happened in the story rather than why the author structured it that way.
The fix: Before answering any Literacy question, read the question word carefully. “What” asks for information. “Why” asks for a reason. “How” asks for a method or explanation. These three words determine whether the answer is in the text (literal) or needs to be inferred (inferential).
Mistake 2: Choosing the most obvious answer instead of the most accurate one
NAPLAN multiple choice questions are deliberately designed with a trap answer. It is the option that sounds right or is directly mentioned in the passage. The correct answer is often the less obvious option that better fits the specific question.
The fix: Read all four options before choosing. Cross out the obviously wrong ones first. Between the two remaining, re-read the question and find the exact part of the passage that supports your answer.
Mistake 3: Ignoring vocabulary context clues
When a vocabulary question asks “what does the word X mean in paragraph 3?”, students often answer based on the general meaning of the word rather than how it is used in that specific sentence. In NAPLAN, words can be used in unexpected ways and the passage always provides clues about the intended meaning.
The fix: For every vocabulary question, find the word in the passage, cover it, and read the surrounding sentences. What word would make sense here? Then match that meaning to the answer options.
Numeracy mistakes
Mistake 4: Stopping one step too early
A student correctly calculates part of a problem and chooses that as the answer without checking whether the question asked for something else. For example, calculating the total cost of items correctly, but the question asked for the change from $50.
The fix: After each calculation, re-read the last sentence of the question. Does your answer respond to exactly what was asked? This one habit eliminates a significant number of Numeracy errors.
Mistake 5: Confusing area and perimeter
The single most consistent measurement error in NAPLAN Numeracy. Students who know both formulas still switch them regularly, especially when the question uses a shape they have not seen before.
The fix: Perimeter is the distance around a shape (add all sides). Area is the space inside a shape (length × width for rectangles). Write these definitions on a practice card and review before the test. When you see a measurement question, underline the word “area” or “perimeter” before starting.
Mistake 6: Misreading graph scales
When a bar graph's y-axis increases in steps of 10 but a bar reaches between two marks, many students read the nearest mark rather than the actual value. In more complex questions, students read a table or graph correctly but then use the wrong row or column.
The fix: Before reading any value from a graph or table, check the scale. What do the small marks represent? What are the intervals? Put your finger on the bar or line and trace it horizontally across to the axis.
Mistake 7: Answering the wrong part of a word problem
In multi-step word problems, students often answer one of the intermediate steps. For example, finding the cost of one item when the question asks for the cost of five items. This error is especially common when students are working quickly.
The fix: Underline the actual question in every word problem before solving. Make sure your final answer responds to that underlined sentence.
Language Conventions mistakes
Mistake 8: Apostrophe confusion
The most common Language Conventions error at every year level. Students who know the rule in isolation still make errors when reading quickly, because the wrong form can sound right. Its versus it's, your versus you're.
The fix: Always apply the substitution test. Can you replace “it's” with “it is” and have the sentence still make sense? If yes, use “it's”. If no, use “its”.
Mistake 9: Comma splice
“I went to the park, it was raining.” This is a comma splice. Two independent clauses joined by a comma, which is grammatically incorrect. Many students write this in their own work and also fail to spot it in Language Conventions questions.
The fix: Two complete sentences can be joined with a semicolon (“I went to the park; it was raining”), a coordinating conjunction (“I went to the park but it was raining”), or kept as separate sentences. A comma alone is never enough.
Writing mistakes
Mistake 10: Writing without a clear position or structure
The most common writing error: students describe both sides of an argument without taking a position (for persuasive writing), or write a sequence of events without a clear narrative arc (for narrative writing). Both produce essays that are technically competent but miss what markers are actually looking for.
The fix: For persuasive essays, state your explicit position in the first paragraph and do not waver. For narratives, plan a clear problem and resolution before you start writing. A 3-minute plan before writing produces better essays than 3 extra minutes of unplanned writing.
The underlying pattern: slowing down saves marks
Most of these errors share a common cause: moving too quickly. NAPLAN tests are not strictly time-limited in the sense that most students can finish with time to spare. The students who score highest are not faster. They are more careful about what the question is asking before they answer.
Training your child to pause and re-read the question before answering, rather than moving immediately from reading to answering, eliminates more NAPLAN errors than any other single habit.
BandBoost's AI feedback identifies which of these patterns are appearing in your child's practice responses, giving you specific and actionable insights rather than a raw score.