We wrote down each lesson on a craft stick and then divided them by subjects that inspire (blue) and that discipline (green) and painted the tips in their respective, assigned colors. If you are not familiar, inspired lessons might include singing, picture or music study, a nature walk, history and literature; while a disciplined lesson would be maths, copywork, reading {learning to} and Latin. Charlotte Mason wanted children to move between lessons that stretched and engaged various parts of the brain so as not to become weary of, and in turn exhausted and disinterested, of the lesson at hand.
"[B]ut this much is certain, and is very important to the educator: the brain, or some portion of the brain, becomes exhausted when any given function has been exercised too long. The child has been doing sums for some time, and is getting unaccountably stupid: take away his slate and let him read history, and you find his wits fresh again. Imagination, which has had no part in the sums, is called into play by the history lesson, and the child brings a lively unexhausted power to his new work. School time-tables are usually drawn up with a view to give the brain of the child variety of work; but the secret of weariness children often show in the home school room is, that no such judicious change of lessons is contrived." --Charlotte Mason, Volume 1, pp 24