My ds would not discuss his reading with me in K, unless he was incredibly excited by the book.

I would receive similar non-responses to questions like "how was your day?"

Testing eased my mind that my ds was comprehending his books, or at least comprehending enough to sit for long periods of time and read.

I think that a) kindergartners in general aren't the greatest communicators and b) my son would balk because he wants his books (and his day) to be "his" thing- not some assignment where he has to report back to me.

I let it go at the time. Now, that he's in first, I noticed that he will start to loosen up and tell me more about academic life at school, and bit about what he is reading.