Our classes are intended to be taken synchronously (live), and regular attendance in class sessions is expected for each course. Since the classes are interactive discussions, many teachers even assign a participation grade. Missing an occasional class is not a problem, but missing many classes makes it difficult for even a strong student to do well in the course. To increase flexibility for busy homeschooling families, recorded class sessions are available to students enrolled in that class for four weeks after a class session. These recorded sessions are not intended to replace regular attendance in the live class sessions. If for any reason a student plans to miss or ends up missing more than three live class sessions in a fall or spring semester, the family must obtain concurrence (prior to enrollment, if the absence is planned that far in advance) from the teacher for the student to continue in the course. Because summer sessions move more quickly, a student may plan to miss only one summer class in a three-week period, and that must be coordinated prior to enrollment with the teacher. We will consider other exceptions with prior approval, particularly for overseas students with limited internet connections.