Hi G.. I was a teacher for six years and just decided to stay at home with my two boys. I have a few tips for you. Number one read with her all the time. Make sure you have books that are a little above her reading level and continue asking her those questios. Ask her teacher for books that are at her reading level. Second, start reading a chapter book with her that is higher than her reading level. You both can take turns reading it. While you are reading ask tons of questions, but also share what your thinking and why your thinking that because of what your read. Share what you are picturing, laugh, sigh, be very expressive. Kids learn best when it is demonstrate. As you are doing that, ask her to share what she is thinking, feeling,...etc. Make sure you share why your thinking that, connect it to the story, the paragraph, or sentence. As for comprehension work books, go to a teacher supply store and ask someone there for a good comprehension workbook at a third grade level. When she answers the comprehension questions in the workbook, make her underline the sentence or sentences in the story that answer the questions. Lastly, I don't remember what the website is called, but there is a website where kids can take reading comprehension test on a book they have read. It is like Accerated Reader or Reading Counts (I don't really know what program the use out hear).
Some kids just don't enjoy reading, find books that she likes. And remember a child's reading ability is not evaluated on how well he/she can read the words, but on how well he/she understand what he/she is reading. Don't read books that she doesn't understand it will only create more frustration on both ends. You have to find a book that is slightly above her reading level. Please ask her teacher about certain chapter books that would be good for her. Her teacher is your best resource because he/she knows and understands her abilities the best.
I hope this is helpful. I can contact the teachers I worked with last year to find out about the website.
M.