Moore Middle School was built to replace Redlands Junior High School. In its first year of operation it welcomed most of the staff that had previously taught at that first junior high school in Redlands. Its first full year of operation was in 1966-67. Floyd Allen was the first principal and Miss Peg Parminter was the first assistant principal.
When Moore opened it was surrounded by citrus groves and most students were bused. Over the years it has developed into a true neighborhood school as population growth has created a series of neighborhoods that now surround Moore. In its early history, Moore was a 7,8,9 junior high school. For a brief time it became a year round 7,8 school and five years ago it reverted to a 6, 7, 8 program on a traditional calendar. Moore now houses over fourteen hundred students and has a faculty and staff of over one hundred. It is one of the finest schools in the San Bernardino County and prides itself on excellence.