Virtual charter schools, like K12 provide school at home services utilizing the internet as the principle mode of study. There are more than 80,000 children studying with K12 as I write this entry.
The program is generally marketed to homeschooling families as you've probably noticed their ads on various websites and blogs while browsing around for homeschooling resources for your family. If you are truly wanting to homeschool, online charter schools generally do not provide that. They are public schools; you do not get to choose curricula or educational approach. Thus, your child most likely will not get the stellar education that you would like to provide. However, many single parent homeschoolers do use them, especially those new to homeschooling.
In an article in Bloomberg Business Week, titled "Education According to Mike Milken," the poor academic outcomes of children being educated through K12 is evident. It states: "Three-quarters of K12 schools failed to show sufficient progress, compared with 45 percent of the physical charter schools in the study. K12's results are "just shocking," says Gary Miron, a Western Michigan University professor, one of the study's authors."
While I'm not going to just up and say "stay away from these programs," I will say that you will need to supplement significantly in order to attain the academic successes frequently experienced by the average homeschooled child. Programs such as K12 set standards based on that used for government-based schools, meaning that the bar is at a low/average academic level. Even though the program may seem very rigorous, it is primarily due to the amount of work expected rather than the type or quality of education provided.
Bloomberg Businessweek, June 2011:
Education According to Mike Milken. With K12, the largest U.S. operator of tax payer funded online schools, the former junk-bond king has figured out how to make money in education. Is that a good thing?