How do you teach a child to answer an unseen passage?
Treat it as a searching task, not a reading task. That one change fixes most of the trouble, and it explains why so many parents are puzzled by the marks: their child reads aloud beautifully, understands the story when you talk about it, and still brings home four out of ten.
Reading and comprehension are two different skills. Reading turns marks on a page into words. Comprehension means holding on to what those words said, finding the exact spot that answers a particular question, and writing that back in a form the marker will accept. A child can be strong at the first and never trained in the second, and the Class 3 paper only ever tests the second.
The method that works has three parts, and it takes roughly a fortnight to bed in:
Read the questions before the passage. Most parents feel this is a kind of cheating. It is not - it is the gap between reading with a purpose and reading in hope. A child who already knows he is hunting for a colour and a number reads the passage like a search.
Underline the answer before writing it down. The pencil lands on the line in the passage that holds the answer, and only after that does the child start writing. This single habit removes the biggest cause of lost marks: answers made up from memory instead of found in the text.
Answer using the passage's own words, in a full sentence. Class 3 markers want the answer lifted out, tidied up, and handed back as a sentence. Not one word, and not something remembered and reworded.
If the trouble sits in reading itself rather than in comprehension, when a child is weak in reading English is the better place to start. If you want practice pages built to this shape, the Class 3 English tests are free, with no sign-up.