PTMidwest---there are 153 pages in the UnMethoders Book. The authors do use Jane Magrath's Leveling for the most part, but they've categorized it even further. I can't answer the question exactly, as I still haven't got my hands on Jane Magraths guide to standard teacher and performance literature. I have it on order....but it is a different take--the book helps a teacher set up a teaching style that doesn't rely solely on method books and uses original pieces from the very beginning.
Could a teacher with years of experience with this do it without the book? I imagine, yes, but if you're trying to go to this way and have questions...it helps. It also helps you quickly find exactly the right piece for a certain skill at a certain level. That's the handiest feature, I think.
I will say that they use a lot of modern composers. The classical period and baroque period are limited a bit in choice. These are the book they categorize:
J.S. Bach--"An Intro to His Keyboard Music" (alfred pub)
JS Bach--Little Preludes 1-19
Bela Bartok--First Term At the Piano, For Children, Vol I and II
Beethoven--"An Intro to his Piano Works" (alfred pub)
Ernest Bloch--Enfantines
William Bolcom--Monsterpieces
Burgmuller--Etudes, OP 100 and 109
Paul Creston--Five Little Dances, Op 24
Debussy--Children's Corner
Norman Dello Joio--Suite for the YOung
David Diamond--Album for the Young, Eight Piano Pieces
Enrique Granados--Cuentos de La Juventuid, Op 1
Gretchaninoff--Children's Album
Handel--Six Fughettas
Haydn--An Intro to his Keyboard Works (alfred pub)
Heller--Etudes, OP 45, 46 adn 47
Kabalevsky--30 childrens Pieces, OP 27 also Op 30
Khachaturian--Children's Pieces
Witold Lutoslawski--Folk Melodies/Three Pieces for the Young
Mendelssohn--Kinderstucke, Op 72
Mozart--"An Intro to his Keyboard Works" (alfred pub)
Robert Muczynski--Fables, Op 21
Vincent Persichetti--Little Piano Book, OP 60
Octavio Pinto--Scenas Infantis
Francis Poulenc--Villageoises
Prokofiev--Music for Children, Op 65
Satie--Children's Pieces for Piano
Scarlatti--Intro to his Keyboard Music (Aldred pub)
Schumann--Kinderszenen Op 15, Album for Young Op 68
Shostakovich--Dances of the Dolls
Robert Starer--Games with Names, Notes, and Numbers, Sketches in Color
Alexandre Tansman--Happy Time Book 1, 2, 3. Pour Les Enfants, Book 1, 2, 3, 4
Tchaikovsky--Album for the young, Op 39
Joaquin Turina--Ninerias, Op 21
Ralph Vaughn-Williams--A little piano Book
Heitor Villa-Lobos--Guia Pratico, Albums 1, 2, 3, 8, 9. Suite Infantil, Albums 1,2