PRE-JHS stands for Pre-Junior High School and is a term used to refer to the educational level of students between elementary school and junior high school. It is typically used in countries that have a three-tier educational system, such as Japan, where students attend elementary school for six years, pre-junior high school for three years, and then junior high school for three years. The term ELEM, which is the answer to the crossword puzzle, is an abbreviation for elementary school.