Are teachers still exempt if they earn less than $23,660?

Q. My understanding is that teachers, by the nature of the definition of "Learned Professional Employees," would be exempt employees. Under the salary test “Employees earning less than $23,660 annually (or $455 a week) now automatically qualify for overtime pay.” How does this apply to a teacher who is paid for a nine-month work year? Do I assume that using the salary test of $455/week applies to their nine-month contract? Thus, if they are paid $455 for 38 weeks of employment for a total of $17,290 they qualify as exempt? – Von, Oregon