Science was one of those subjects that didn't really get done in our house in K-2. In K and 1st dd8 went to a once-a-week tutorial that did a little bit of fun science. Second grade --nothing.
This year, her tutorial did Apologia Land Animals, and I was starting to get concerned that dd wasn't getting a broad base of general science knowledge. So I downloaded Mr. Q life science, bought earth science when it went on sale in January, and gave it to grandma to read with dd (my mom helps with some of the schooling). No experiments, no tests, just read and chat.
I just got dd's achievement test results. She got every. science. question. correct. 99th percentile. And her other subjects didn't match up to that, it's not just that she's some awesome test taker.
So, if test scores matter to you (I know it's not a big deal for everyone), then Mr. Q is your friend.