Simple:
* The student struggled with the spelling of "pneumonia."
* The teacher emphasized the importance of correct spelling.
Descriptive:
* The old book had charming, slightly faded spelling in its handwritten notes.
* Her spelling was impeccable, even when writing in a hurry.
Figurative:
* The rumors about the scandal were a complete mis-spelling of the truth.
* Their relationship was a perfect spelling of disaster.
Funny:
* The comedian's joke was a spelling bee of bad taste.
* The dog chewed on the homework, leaving the spelling assignment in a state of complete disarray.
Which one sounds best depends on the context you're aiming for!