Can I in describing someone's ability to stay attentive use the plural noun "levels"? Or will it sound awkward? For example:
"Jim had one serious problem - he couldn't stay focused on any given topic for more than half a miinute. Teachers began to complain. So his father took him to a doctor. The doctor prescribed Jim with a special "attention pill". Jim was to take it right before his next lesson. Jim did. His attention levels soared soon after that."