OST ELA Grade 3 common mistakes
OST ELA Grade 3 · Understand the traps and how to avoid them.
When asked to find the main idea of a short literary text, the student retells the whole story in order instead of stating what the story is mostly about.
Young readers often equate 'main idea' with 'what happened' and have not yet learned to distinguish a summary of events from a central message or lesson.
What to do instead
Practice the 'one-sentence summary' routine: after reading, cover the text and say who the story is mostly about and what the big thing that happens is, then check by asking 'Does this tell about the whole story or just one part?' Use graphic organizers that separate 'events' from 'what the story is really about'.
When asked how a character feels or why a character acts a certain way, the student gives a personal opinion ('I would be mad') without pointing to words or actions in the text.
Third graders are still developing perspective-taking and often rely on their own feelings rather than searching the text for evidence.
What to do instead
Teach the 'feelings detective' strategy: underline the character's actions, dialogue, and facial expressions, then use a sentence frame such as 'The character feels ___ because the text says ___.' Model with a think-aloud and have students highlight evidence before answering.
When asked to explain how a diagram or a text feature helps the reader understand an informational passage, the student only describes what the feature shows ('It shows a picture of a volcano') without explaining its purpose.
Students often focus on the literal content of the feature and have not learned that text features are tools authors use to give extra information or clarify ideas.
What to do instead
Use a two-column chart: 'What I see' and 'How it helps me.' Practice with a variety of features (maps, captions, bold words, diagrams) and ask 'What would be harder to understand without this?' Provide sentence starters like 'This feature helps me understand ___ because ___.'
When asked to compare two informational texts on the same topic, the student lists details from each text separately without stating a similarity or difference between the texts themselves.
Students may not realize that comparing texts requires looking across both texts, not just summarizing each one. They also may lack the vocabulary to express comparisons.
What to do instead
Use a Venn diagram with one side per text and a center for 'both.' Model how to write a comparison sentence: 'Both texts say ___, but the first text also ___.' Practice with short paired passages and explicitly teach signal words (both, also, but, however, unlike).
When writing an opinion piece, the student states a preference but gives no reasons, or gives reasons that are unrelated to the opinion.
Third graders often assume the reader knows why they think something and have not yet internalized the structure of opinion writing (opinion, reasons, examples).
What to do instead
Provide an opinion writing frame: 'In my opinion, ___ because ___. For example, ___.' Use a graphic organizer with a box for the opinion and two boxes for reasons with evidence. Have students orally rehearse reasons with a partner before writing.
When writing a narrative, the student writes a list of events ('First we went... then we... then we...') without developing characters, setting, or a sense of closure.
Students may not have had enough exposure to narrative structure or may be rushing to finish, focusing on sequence rather than storytelling elements.
What to do instead
Use a story mountain or story arc organizer to plan characters, setting, problem, events, and solution. Model adding descriptive details (what characters see, hear, feel) and a closing sentence that shows how the character felt or what was learned. Provide mentor texts for analysis.
When answering a multiple-choice question about a word's meaning in context, the student chooses the most common meaning of the word rather than the meaning that fits the sentence.
Students often rely on their first encounter with a word and do not automatically check whether that meaning makes sense in the sentence.
What to do instead
Teach the 'plug it in' strategy: try each answer choice in the sentence and ask 'Does this make sense?' Practice with multiple-meaning words (e.g., 'bank,' 'light,' 'spring') in sentences that use less common meanings. Use a dictionary to confirm.
When asked to form a plural noun, the student writes 'mouses' or 'childs' instead of 'mice' or 'children'.
Students overgeneralize the regular plural rule (-s or -es) and have not yet memorized irregular plural forms.
What to do instead
Provide a word bank of irregular plurals and practice sorting words into regular and irregular columns. Use chants, songs, or mnemonic devices. Include irregular plurals in daily oral language activities and writing conferences.
When writing a sentence, the student writes a run-on sentence with multiple ideas joined by 'and' or no punctuation, or writes a fragment missing a subject or verb.
Third graders are experimenting with longer sentences but may not yet understand sentence boundaries or how to use punctuation to separate ideas.
What to do instead
Use sentence-building activities: start with a subject and verb, then expand with details. Teach the 'one idea per sentence' rule and practice combining short sentences with conjunctions. Use editing checklists that include 'Does every sentence have a who and a what?' and 'Did I use periods and capitals?'
When asked to use a glossary or dictionary to find the meaning of a word, the student picks the first definition listed without checking which one fits the sentence.
Students may not understand that words can have multiple definitions and that context determines the correct one.
What to do instead
Model the process: read the sentence, read all definitions, eliminate ones that don't make sense, and choose the best fit. Practice with words like 'order' (sequence vs. command) and 'row' (line vs. argument). Have students explain why they chose a definition.