Speech offers a powerful avenue between user and computer. However, if the user is not speaking, or is speaking to someone else, what is the computer to make of it? Project LISTEN’s Reading Tutor is speech-aware software that strives to teach children to read. Because it is useful to know what the child is doing when reading, we are investigating some potential uses of computer vision. By recording and analyzing video of the Tutor in use, we measured the frequency of events that cannot be detected by speech alone. These include how often the child is visually distracted, and how often the teacher or another student provides assistance. This information helps us assess how vision might enhance the effectiveness of the Reading Tutor.