I have used the Highschool Homeschool Journal for each of my children. It has the best layout of any (hard copy) homeschool record-keeping book on the market. Plenty of space for classes, an easy-to-use tracker for hours spent in class, and extra pages for field trips. It really makes end-of-the-year review time simple!
I picked this journal up at a homeschooling conference last year and it worked perfectly for our school. If you teach many different styles in your home school, this is a great planning tool. There is plenty of room for each subject on a daily basis. There is a place for grades, calendars for field trips, calendars for the school year and pages for supplemental materials. We will be buying one each year until graduation.