We have been homeschooling for eight years. We started when my oldest was in third grade and the younger two were a preschooler and a toddler. My oldest is now finishing up tenth grade. I have tried several different planners and a couple of different computer based school tracking systems. I find that even though I now use Homeschool Tracker for keeping our records and printing daily lists, attendance, transcripts, etc., I still need a paper planner to visualize our schedules and various activities and to make notes on the run.
This year I bought The Well Planned Day and I have been filling it with my schedules and plans for the rest of summer and next school year. I really like the format and that there is plenty of room to write notes and keep track of all the things my kids are involved in. The only thing I think might be a useful addition would be pockets for loose papers, stamps, etc. I really like the shopping lists, the fact that there is room for four children and the holiday organization section.
I just recently found The Checklist by Cindy Downes at Oklahoma Homeschool. It is exactly what the name implies -- a huge checklist of so many things I couldn't possibly list them all here.
All products discussed were purchased by me.