Next time she stares at you put some tie-rips on your table and a bottle of cloroform. Then whisper : Keep staring bitch.........
Maybe she is re-inacting twilight , that Edward dude staring at belle freaky stuff
Next time you catch her staring at you just stand up put your hand in your pants pull out some spaggeti and squise them hard really hard , then return at tell us what happend we will provide more help.
It must be your bad personal hygiene, she must be looking around the class for the stench of dead animals...
Only kidding, speak with her and see what happens