ok, so in an attempt to work all this stuff through...I created three tables.
tbl_Job: JobID (PK), Job Title
tbl_Courses: CourseID (PK), CourseName, Expiration
jtbl_ReqTraining: JobID (PK), CourseID (PK), Required (Y/N)
So I complete the table with all courses by id and jobs by id and...