Parent involvement has been an important aspect of public education in the United States since the beginning of public education. Much research has been conducted over the years to show the importance of parent involvement, but the majority of these studies have focused on involvement at the elementary level. Recent studies have shown that even though the level of parent involvement at the high school level is equally as important as at any other grade level in terms of student success, the number of parents who stay involved in their child’s educational journey once they reach the high school level drops dramatically. This literature review will analyze studies and information that support the need for various levels of parent involvement at the high school level. The review will look at the history and definition of parent involvement, some of the factors that impact parent involvement, the effects of the lack of involvement, and the benefits of involvement at the secondary level.