WordNet (r) 3.0 (2006):

elementary education
    n 1: education in elementary subjects (reading and writing and
         arithmetic) provided to young students at a grade school

Moby Thesaurus II by Grady Ward, 1.0:

22 Moby Thesaurus words for "elementary education":
   abecedarium, abecedary, adult education, and arithmetic,
   continuing education, elements, first steps, graduate education,
   higher education, hornbook, initiation, introduction,
   liberal education, postgraduate education, primary education,
   primer, propaedeutic, reading, rudiments, secondary education,
   vocational education, writing