Emma was disappointed to see that Tabitha was unable to have Kitty's good sense and at least pretend to stay awake. Considering all the trouble Tabitha had gotten herself into by not paying attention one could only hope she would learn from her mistakes. Emma paused for a moment in the lecture to try and get Tabitha's attention.
Tabitha! Emma projected her thoughts into the girls head. I would think you'd know better than to fall asleep in my class. Emma was trying to give the girl a reprieve from public humiliation by being discrete.