Sentence diagraming, once thought to be a necessity in a seventh grade education, then discarded as too complicated and irrelevant, now returning in some schools, has never left my seventh grade curriculum.  As a tool for teaching analysis and structure, it forces the student to identify how words function in sentences.  As a tool for teaching logical thinking, it is excellent and applies to anything the student chooses to do later in life.
    Planning on becoming a doctor?  Sentence diagraming teaches accurate diagnosis.
    Planning on becoming a lawyer?  Sentence diagraming teaches the intricacies and often illogical convolutions of American jurisprudence.
    Planning on becoming a farmer?  Sentence diagraming teaches how to fix the darned baler that breaks down in the middle of the back 40 on Sunday morning after church.
    Logical thinking applies to us all, in whatever occupation chooses us.  It will guide our learning when we thought we were finished with school, and only now begin our real learning, and it will show us the path when we've strayed too far.