Once a child can get through a chapter book, parents often stop reading to them. That is when the harder vocabulary still lives in books they cannot yet read alone.
Decoding a book is not the same as knowing the world in it
A child who can sound out a Magic Tree House page is not done with being read to. The books that grow vocabulary and background knowledge are often a step harder than what they can decode cleanly. If you only hand them what they can read alone, their knowledge stalls at their decoding level.
The IES guide on improving reading comprehension in the early grades tells teachers to teach students how to use the text and to talk about it. That work happens just as well on the couch. You stop, ask what a word means, and connect it to something they already know. The conversation is the lesson.
What to read when they already "can read"
Pick books with sentences they would trip over alone: history, science, longer stories, older fiction. You carry the decoding. They carry the thinking. Ask what just happened, what a word might mean, and what they would expect next. Then keep going. A read-aloud that turns into a quiz every paragraph dies.
Isabel Beck and Margaret McKeown's work on text talk is the practical version of this. Choose a few rich words from the chapter. Use each one in a new sentence after you finish. Do not turn the whole book into a vocabulary packet.
- Read something harder than their independent book, most days.
- Stop for a handful of words, not every unknown one.
- Let them follow along sometimes and just listen other days.
- Keep their own decoding practice in a separate, easier text.
This is not a replacement for phonics
Read-alouds do not teach a struggling decoder to map letters to sounds. They fill the other tank: language, knowledge, and the reason anyone bothers to decode in the first place. Do both. A child who only hears great books and never learns the code stays dependent. A child who only decodes easy text stays thin on knowledge.