Why wait until my child is 6 to move on to Year 1?
Most of us at one time or another feel the itch to go ahead and jump into Year 1 before a child is 6, since after all our little ones can already handle listening to the reading. Why wait? And we get lots of outside pressure, in many cases, to be doing formal school rather than this "whatever-it-is" that we call Year 0.
Pressing on with Year 1 early may in fact be the right choice for your child, but there are good reasons for waiting that need to be weighed and considered. This is a decision to be made carefully, with study and prayer.
Year 0 is a lot more than just read-alouds. (In fact, read-alouds are really a very small part of it. CM didn't recommend spending huge amounts of time reading to the children in the early years anyway. She wanted them to be up and around.) There's so much more to focus on, including habit training and nature study (and lots and lots of time spent outside), and those things are *extremely important*, not just nice-to-haves or something to kill time before the kids are ready for "real school". If you start doing Year 1, you may find that you are keeping the kids inside much of the time to "do school" and robbing them of the outside time they need. There isn't really a Year 0 booklist; the books listed here on the AO site are just some suggestions to get you started. But you'll probably find that as you emphasize outside time more (the goal is 4-6 hours *a day* remember!) you won't need so many books to read because you're not inside reading.
One of the benefits to waiting until age 6 (or thereabouts) to start Year 1 is having time to get the extras firmly entrenched in your family schedule before you have the pressure of school. For instance, this is a great time to start doing art study, composer study, poetry, tea time, physical education, foreign language, hymns, folk music, etc. If you get those subjects going smoothly, then you can add in the Year 1 subjects without so much stress. Habit training makes life easier for everyone, and this is a great time to work on it intensively. You can still teach many of the concepts you want to teach without making it school. Math is easily covered through games, cooking, and other real life situations. Pre-reading and even early reading lessons can be done very casually, but you could even do a formal reading program without having to start Year 1.
Starting Year 1 early may lead you to have to slow things down later, when the readings get much more intense. That's another factor to consider. In a few years the readings take a big jump in difficulty and in the maturity of the themes, so you may find that you need to do one of those years for two years to give your kids time to mature before moving on.
CM very strongly encouraged parents to delay formal education until approximately age 6, for a whole host of reasons. (This does not mean you don't teach children before they are 6. It means you don't sit down and do formal lessons each day whether they like it or not.) Children need time to really play, to imagine, to run and jump and breathe fresh air, to explore the world around them without interference, to let their brains mature without a lot of strain. Charlotte Mason is not alone in recommending this, and research supports her. Look at this time not as "wasted" but as valuable preparation for the later years, even if the preparation doesn't look like school.