This booklet is a helpful resource. The schedule is fast-paced, but it really must be in order to finish the course in 180 days. One could certainly create his/her own lesson plans, but the time it would take makes buying these plans well worth the money.
I've been using Lynn's guides for 7 years with several children. I recommend them to anyone using Apologia's upper level courses. They do all the work of scheduling for me! The pace is quite doable, with both the motivated and non-motivated science student.