Yup! Students can be monitored in multiple teacher sessions!
This is common for students who might need to be monitored by someone else, such as an individual aide, for the entire day. This may also occur if the teacher's sessions overlap. In rare instances, scenes might conflict and provide a "You're popular!..." message.
Overriding the Scene by clicking "Refresh Scene" will do the trick to enable browsing again.
Teachers can also run multiple sessions at once!
A teacher may decide to observe multiple classes at once. To toggle between sessions, select the session from the top of your screen.