When to use it
Use it when spelling the head of a school to remember that the word ends in -pal because a principal is a pal.
Example
The school principal signed the letter. A moral principle guides behavior. The -pal ending signals a person or title, not an abstract idea.
Common mistake
Using principle when referring to a person. Principal ends in -pal when it means a leader; principle ends in -ple when it means a rule or belief.
