Here is a list of some computer or DVD-based homeschool class options:
Bridgeway Academy – Offers 9-week learning labs in different subjects.
Founders Academy – Offers classes for history, government, and economics for elementary ages.
Classes through CurrClick – Offers classes in a variety of subjects for all ages. They even offer free book clubs for Magic Treehouse books and American Girl books.
Athenas Advanced Academy – Offers classes in subjects such as writing, history, science, and languages. There is no minimum age requirement to enroll for the courses but there are recommended ability levels for each class. Many of the classes are geared for upper elementary and older.
BJU online or DVD programs – Offers all subjects through online courses of DVD-based classes. (I especially want to try their science courses!)
Veritas Press – Offers self-paced history and Bible courses for elementary ages.
Compass Classroom – Offers Latin classes via download or DVD for upper elementary.
Time for Writing – Offers writing instruction with instructor feedback for a variety of age levels.
Memoria Press – Offers classes for all ages but has a few courses for youngers – such as literature and classical studies, and classical composition.
Institute for Excellence in Writing – Offers online writing courses for all ages and has a class for Student Writing Intensive Level A (also includes grammar) for grades 4-6.
Classical Academic Press – Offers Latin, Spanish, Bible, and Writing for grades 4th and above.
Landry Academy – Offers online classes in all subject areas for grades 4th and above.
Essentials in Writing – Offers DVD-based courses in writing for grades 1 and older.
Heritage History – Offers an online Young Readers course with a survey of literature that is appropriate for upper elementary students.
History at Our House – Offers online history courses for 2nd grade and above.
Homeschool Spanish Academy – Offers online instruction with native speakers for elementary ages and above.
This list is not exhaustive. I tried to include only options that I found that have options for elementary students. There are many other options for middle school and high school that I have not listed.