Yes! For 3rd grade, their lists went right along with our Calvert ones. Not so for 4th grade, so there is an option to edit their word lists. I just erased their words and did a search within their word list for the ones I wanted to add. All of them were on their list, so they already had sentences for them pre-programmed into the site. The sentences are used for activities when the computer voice asks, "Spell 'know'. I always want to know more about birds." They give you the words in sentences.
Admittedly, it would have been great to get access to the site for free again this year, but we got such a benefit from it last year, we decided to just pay for it this year. :-)
Patty