Since I can't shut up about how much I like this program, here's the link:
It's a daily phone call (long distance--I use Vonage, others use Skype) where the kids teleconference with other class members and the teacher four days a week for a 1/2 hour lecture. Three of the those days are history presentations. The fourth day is an art appreciation lecture where the subject is historically related to the topic discussed during class. It also includes a weekly geography map to label, also generally related to the area studied during the year.
There are three tiers of attendance: full attendance (call in for every teleconference), once-a-week attendance (call in once during the week, preferably on a given day and listening to MP3s for the rest of the week's lectures), and listening to MP3s without actually calling in at all (no need for any long distance phone call). Each MP3 is about 24 MB. The highest price is for full attendance (which I love, though I find it expensive for my budget--but not expensive for what is offered). The lowest price is for MP3s only.
There are varied levels to match your students' age and aptitude. History at Our House offers a Lower Elementary, Upper Elementary, Middle School, and High School levels. With the exception of High School, the cost is a single payment for each level. So two students in Upper Elementary pay just once.