No Child Left Behind has been a boon to entrepreneurial supplemental educational service (SES) providers. Struggling schools must provide supplemental services to students in an effort to boost their achievement. Federal funds pay for much of this extra instruction; states may pick up some of the tab, as well. School systems may purchase supplemental curriculum materials for use in the classroom or offer after school classes. They can schedule group or individual tutoring with paid volunteers or private companies, or they can offer services from an online tutoring provider. In this article, the author describes some online tutoring services and their advantages. Online tutoring is available for an extended time period, and students can access help when they need it, even at home. Online providers take responsibility for monitoring the quality of the assistance they offer, and their services may cover a wider range of grade levels or subjects than typical individual tutors can. Thus, for students in remote rural areas, online tutoring could very well be the best--if not the only--option.