Parental involvement has been recognized as an important factor for student achievement in traditional school settings. The lack of research regarding the effect of parental involvement on student achievement in virtual schooling is, in part, due to the absence of a valid and reliable instrument to measure this construct. This paper provides an overview of parental involvement in traditional education, discusses its role in K-12 virtual schooling, and describes a study that validates a parental involvement assessment with a virtual school population. The results of this study show the instrument is overall a valid and reliable measurement for parental involvement in the virtual school environment. Implications for research in virtual schooling are addressed, and suggestions were given to modify this instrument for use in future studies. (Contains 3 tables and 3 figures.)