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OSSLT guide

Common OSSLT mistakes and how to avoid them

The mistakes that cost OSSLT marks most often, part by part: the reading questions, the short written answer, the writing questions and the opinion essay, with the fix for each one and a way to check your own work before test day.

Updated October 30, 2026. By Litguide. Litguide is an independent practice platform and is not affiliated with EQAO.

Why the same mistakes keep showing up

The OSSLT measures the reading and writing skills expected across all subjects by the end of Grade 9, so almost nobody loses marks for not knowing something. Marks go when a student answers a different question than the one asked, skips a question, or writes an essay that does not do what the rubric rewards. Every mistake below has a fix you can practise.

In the reading questions

  • Reading the passage first and the question last. Read the question first so you know what to look for, then go to the text.

  • Answering from memory. Go back to the passage for every question. The line that settles it is there.

  • Choosing the first answer that sounds right. When two choices seem possible, find the detail that rules one out.

  • Treating every question as single choice. Multiple selection and checklist questions need more than one answer, and the instruction says so.

  • Leaving questions blank. A blank scores zero and a guess costs nothing. Answer all 35 selected-response questions.

  • Guessing a word's meaning from the word alone. The questions ask what a word means in context, so read the sentence before and after it.

In the short written answer

  • Retelling the passage. The question asks you to answer something about the text, not summarize it.

  • Giving an opinion when the question asks for evidence. Use details from the passage, not from your life.

  • Writing one line. Answer the question in your first sentence, then support it with two specific details from the text.

  • Copying lines without explaining them. A quotation only counts when you say what it shows.

In the writing questions

  • Reading only the sentence with the gap. The 12 selected-response writing questions are about organizing ideas and using conventions, and the right answer depends on the sentences around it.

  • Assuming the longest option is the best one. Choose the option that keeps the paragraph clear.

In the opinion essay

  • Not stating an opinion. The first sentence should say which side you are on.

  • Arguing both sides. Acknowledging the other side in one sentence is fine; weighing them without choosing is not.

  • Writing one long paragraph. The rubric rewards organization: an introduction, a paragraph for each reason, a conclusion.

  • Supporting a reason with another general statement. Each reason needs one specific example, something you have seen, done or read about.

  • Drifting off the prompt. Reread the prompt after your plan and once more before the conclusion.

  • Running out of time. Plan for five minutes, write for twenty, and keep five to check conventions.

  • Leaving conventions unchecked. Spelling, punctuation and run-on sentences are marked when they get in the way of clear communication, and a final read fixes most of them.

  • Opening by rewriting the prompt as a question. Open with your opinion instead.

On test day

  • Skipping EQAO's practice test. It runs on the same platform as the real test, with every question type and the tools.

  • Ignoring the tools. Text-to-speech, the line reader and the highlighter are there for everyone.

  • Not using the rough paper. Plan the essay and note answers on it before committing.

  • Rushing Session B. The opinion essay is about a quarter of the raw score points, and it comes last.

How to check your own work

The two rubrics are the standard. The OSSLT marking guide explains every code, and how to write the OSSLT opinion essay has a sample with the codes marked on it. The fastest check is to write a practice essay on one of the 40 practice prompts and run it through the free essay grader, which returns both rubric codes and feedback on each paragraph in seconds. Then do the free practice test, which explains why each answer is right, and compare its reading questions with the list above.

Questions

Common questions

What is the most common mistake on the OSSLT?

In the writing, an opinion essay with no clear opinion or no specific examples. In the reading, answering from memory instead of going back to the text, and leaving questions blank.

Is there a penalty for guessing on the OSSLT?

No. A blank scores zero and a wrong answer scores zero, so there is nothing to lose by answering every selected-response question.

How many paragraphs should the OSSLT essay have?

EQAO asks for a series of paragraphs. An introduction, two or three body paragraphs with a specific example each, and a conclusion is the shape the rubric rewards.

Can you write about both sides in the OSSLT essay?

You can acknowledge the other side in a sentence, but the essay has to take a position and support it. An essay that weighs both sides without choosing scores lower.

How do I know if my essay is good enough?

Mark it against the rubrics, or use a free grader that does. Litguide's essay grader returns both rubric codes and paragraph feedback in seconds, so you can see which code a paragraph earns and what would lift it.

Practise with Litguide

Get ready for both written answers

Litguide gives students lessons and OSSLT-style reading and writing practice, with every piece of writing marked in seconds against the OSSLT rubrics. Teachers see who needs help before the test window opens. If your school already licenses Litguide, it is free for you.

Practice, marked writing and readiness data for the Ontario Secondary School Literacy Test.

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