Essay (about 500 words describing background and professional goals. this should include the rationale for pursuing a doctoral degree)

Essay (about 500 words describing background and professional goals. this should include the rationale for pursuing a doctoral degree).
the website of the program is:

http://www.gradcollege.txstate.edu/Prospect_Students/Pgms_Apps/Doctoral/Ed_Sch_Improv.html