Because my son is goal oriented, I am not as lax as I would be with any other student. We have set goals and rewards (usually time with friends) for meeting those goals.

each assignment is worth 7% of his grade.
There are 15 assignments for each class.
There is a test out option, but he must pass a comprehensive test of the subject matter with an 80% or better.
Requirements for each class are clearly stated in the syllabus for that class.

Devon has earned the right by completing homework and classwork to do much of his work independently, using a forum to keep in contact.
When in the classroom, Devon has 3 hours of independent study and 2 hours of guided study per day. Guided study covers a different class each day. ex: right now, Devon is taking 5 guided classes. Monday is History, Tuesday is Eco Sciences, ect.

We use books, computer software, Brittanica online, the internet,field trips, and more to enrich the curriculum.

We keep close records of everything we do, which will be transferred to a transcript to enroll him in college when he is ready. We are studying everything he would have to study in Public school, plus allowing for a few classes that follow his interests. We try as much as possible to tie related classes together so he learns the connections between them.

There is more to it, but that's the basic outline of what we are doing.