From the Appendix of Designing Your Own Classical Curriculum by Laura Berquist

For those of you contemplating reading Designing Your Own Classical
Curriculum, by Berquist, I recommend reading her Appendix first. It
will lay the philosophical groundwork for her book. In part, she
states the following:

"In Ecclasiastes 3:1 we read, "For everything there is a season, and
a time for every purpose under heaven." This experience, [she
writes] is something I try to keep in mind when planning the
curriculum of my children. There is a right time for thinking about
subjects and a right way to think about them at a given time. This
right time depends on more than the ability to perform the action.
The student may be able to read the words, but understanding comes
with maturity, and maturity comes from experience and a reflection on
experience that requires a certain amount of time.

She continues: "There is often a temptation, when planning
curriculum, to include material that is too difficult. We want to
see the students moving on to the next stage of development. We want
them to excel, and we do not want them to miss out on the "classics".
But when we include difficult material before the students are ready
to do it, they will not do it well. They may or may not realize that
the material is too hard for them, but the chances are good that they
will not enjoy it. They are also apt to make the mistake that I made
and think that they have understood something when they have not.
This is not necessarily a question of intelligence. It is a question
of maturity.

"I live in a college community, one where the great books of Western
civilization are read as a matter of course. Such books are taken
seriously, and the general opinion is that one's education is not
complete without an acquaintance with them. Yet, the considered
view among many of those who deal on a daily basis with collge
students is that the best students are not those who come to the
college already having read the books included in the program.
Rather, for the most part, the best students are those who have read
history, literature and natural history and who have done basic
astronomy, as well as Latin or another inflected language. A
reasonable study of these disciplies will make the harder courses
easy when the time comes.

"The study of history expands the experience of young people
vicariously, and great literature presents truths about reality that
they would not be apt to see themselves. Natural history, the study
of animals and plants, makes students aware of the workings of
nature, which prepares them for a philosophical study of nature.
These are the types of materials that we should include in our
curriculum, because they equip the student to do more difficult
studies by helping him acquire experience and by encouraging
reflection on that experience.

"One might ask, then, [she says] what happens to the classical
curriculum this book is supposed to consider? How can one have a
classical curriculum without reading the classics? The answer is
that one cannot have a classical curriculum in the fullest and most
perfect sense until one has students who are capable of the kind of
abstract thinking required for a study of the subjects of the
Trivium: grammar, logic, rhetoric; and the Quadrivium: arithmetic,
geometry, music and astronomy. To do these subjects fully, one needs
to be able to read Martin of Denmark and Thomas of Erfert on
speculative grammar, Aristotle on the Prior and Posterior Analytics
and Rhetoric, Euclid's Elements, Plato's Timaeus and Ptolemy's
Almagest. Further, these studies are ordered to philosophy and
theology, which involve reading Plato's Dialogues, Aristotles's
Physics, De Anima, Ethics and Metaphysics, St. Augustine's City of
God, the Summa Theologiae of St. Thomas Aquinas and various other
treatises.

"These are hard subjects, really exciting, but abstract. Even more,
they require preparation: experience, maturity and a disposing
formation.

***"It is the disposing formation that occupies our attention as
homeschooling parents. This formation, because it is a preparation
for a classical education, can in an extended sense be said to be
classical education. It is not classical education in the fullest
sense, but it may still be truly called classical.

"This is the classical curriculum for children as Dorothy Sayers
envisions it in her landmark essay, "The Lost Tools of Learning."
Such an education is about formation rather than information and
depends more on the method used with the texts than on which
particular texts are used.

"Patience is a virtue that is employed in many ways in the raising of
chldren, including the devlopment of their curriculum. The tools of
learning are acquired by concentrating, at each stage, on the areas
of development that are appropriate to that stage. It is not
essential to use ancient authors to have this kind of a classical
curriculum. What is essential is that the children do what is
appropriate at each stage of learning. They should memorize at the
grammatical stage. This strengthens and makes docile their
imagination so that in the next stage of learning, the logical, they
will have the help of a trained imagination in following and
constructing arguments. In turn, it is essential to this education
that when the children are capable of grasping and marshaling
arguments, they should practice doing so. If they do, then the last
stage, the rhetorical, can be given to articulating those arguments
elegantly, in the service of the truly noble. This formation will
give them the tools of learning, a formation that may be truly called
classical and that will dispose them to a formal study of the highest
and best subjects at the proper time."

End quotes.

She gives lots of examples to support her points. I've just touched
on a few highlights. The Appendix is 7 pages long. Even if you
don't want to buy the book, find it in a bookstore and read the
Appendix. Her approach is quite different from TWTM, and the
comparison is worth thinking about.