Tools that support reading fluency and comprehension through guided practice and feedback
I just posted that I was having the same problem, and then I put my hands on one of the ipads that I was troubleshooting last week and the assignment worked.
If the ipads are in low power mode, which they almost always are because, thats what students do. I go into our self service app store and click reinstall to force the app to update. Then I do a hard restart as the icing on the cake. It worked.