What changes in Grade 3
Three things happen at once. Passages get longer and are more often non-fiction. The vocabulary stops being words children already say and starts being words they have only met in books. And questions stop having answers you can point at, because the answer has to be assembled from two or three places in the text.
This is the origin of what researchers call the fourth-grade slump: children who read fluently in Grade 2 can plateau in Grade 4, not because their reading got worse but because the demands changed. The fix is background knowledge and vocabulary, not more decoding practice.
What each grade is typically expected to do
| Grade 3 | Grade 4 | Grade 5 | |
|---|---|---|---|
| Passage length | 150 to 250 words | 250 to 350 words | 350 to 500 words |
| Main skill | Main idea and supporting details | Summarising, and inference from evidence | Comparing two texts, author's purpose |
| Vocabulary | Context clues, common prefixes | Prefixes, suffixes, root words | Figurative language, shades of meaning |
| Answers | A sentence, quoting the text | A short paragraph with evidence | A paragraph citing specific lines |
| Non-fiction | About half of what they read | More than half | Most of it, across subjects |
Typical expectations across the US, UK, Australian and New Zealand curricula, which line up closely on comprehension even where the year numbers differ.
Teach evidence, not just answers
The single highest-value habit in these years is requiring a because. Not what did the character feel, but what did the character feel and which words tell you. Children who answer with evidence do better on every later comprehension assessment, and the habit is easy to build: ask for the line, every time, from the first week.
Model it yourself. Read a paragraph aloud, say what you think and then say which phrase made you think it. Children copy the visible process, not the invisible one.
Main idea is not the topic
The most common Grade 3 to 5 error is answering the topic when asked for the main idea. The topic of a passage might be volcanoes; the main idea is that volcanoes both destroy land and create it. Topic is a noun phrase, main idea is a sentence with a verb.
A reliable way to teach it: after reading, ask the child to say what the passage was about in ten words or fewer, and then check that their answer contains a verb. If it does not, they have given you the topic, so ask what the passage says about it.
Vocabulary is the real bottleneck
By Grade 4 the gap between strong and weak comprehenders is mostly a vocabulary gap, and vocabulary comes from reading widely rather than from lists. Two things help most: reading non-fiction on a range of topics, so background knowledge accumulates, and teaching the common prefixes, suffixes and roots so that unfamiliar words are partly decodable in meaning as well as sound.
When a child hits an unknown word, teach the three-step habit: read the rest of the sentence and guess from context, look for a part of the word you know, then check. Only the third step needs an adult.
A weekly routine
- Two comprehension passages a week is plenty, one fiction and one non-fiction.
- First read for the gist, second read with a pencil, marking anything that answers a question or seems important.
- Answer in full sentences, quoting or referring to the text for anything not stated directly.
- Discuss one question aloud afterwards, especially any the child got wrong, because the discussion teaches more than the marking.
- Keep a running list of new words met, and revisit it on Friday.