She may be thinking of RAZ for kids. It's part of the Reading A-Z group. On it, the students can read leveled books at their reading level, or they can listen to it being read, and then they can take a comprehension test about it. My students love it. It is subscription based, but very reasonable. You as a teacher can get reports about what they are doing and how they do on the comprehension tests. The website is:
http://www.raz-kids.com
Hope this helps.