Is it ensure, insure, or assure?
1530s, "childrearing," also "the training of animals," from Middle French education (14c.) and directly from Latin educationem (nominative educatio), from past participle stem of educare (see educate). Originally of education in social codes and manners; meaning "systematic schooling and training for work" is from 1610s.
discipline that is concerned with methods of teaching and learning in schools or school-like environments as opposed to various nonformal and informal means of socialization (e.g., rural development projects and education through parent-child relationships).