One day Miss Stricken decided to concentrate all her attentions on Nell. 
There was nothing unusual about that—it was standard to randomly single 
out particular scholars for intensive enforcement. With twenty minutes left in 
the hour, Miss Stricken had already gotten Nell on the right hand for 
hair-twisting and on the left for nail-biting, when, to her horror, Nell 
realized that she was scratching her nose and that Miss Stricken was standing 
in the aisle glaring at her like a falcon. Both of Nell's hands shot into her 
lap, beneath the desk.