The whole set is divided into four volumes, which comprehensively includes some important etudes, polyphonic works and Chinese and foreign ditties involved in the piano learning process (junior high school stage).
The degree of completion of the first book is equivalent to 2-3 years (about 1 year).
The completion of the second edition is equivalent to the level of 3-4 (about 1- 1.5 years).
The completion of the third book is equivalent to the level of 4-5 (about 1- 1.5 years).
The completion of the fourth book is equivalent to the level of 5-6 (about 1- 1.5 years).
In fact, this set of teaching materials is mainly used as a supplement to the formal teaching materials (to supplement the small music at various learning stages), and it is basically not used as a special teaching material.
I suggest that you take Cherny's etudes and Bach's polyphonic music as official teaching materials, and take the basic piano course as a supplement, so that learning can be scientific and reasonable.
Cherny Series (Etudes):
1. cherny piano elementary course (Op.599), equivalent to grade 2-3 (1 year).
2. Cherny's fluent piano etudes (Op. 849), equivalent to Grade 4-5 (completed in 1 year).
3. Cherny Piano Etudes (Op. 299), equivalent to Grade 5-6 (completed in 2-3 years)
4. Cherny's 50 piano etudes (Op. 740), equivalent to Grade 7-9 (completed in 3-4 years).
Bach series (polyphony):
1. Bach's elementary piano music collection, supporting 599.
2. Bach's little prelude and fugue, supporting 849
3. Bach's creative music collection, supporting 299
4. Bach's French Suite (select a part to study)
English Suite (Selected Learning Part) Volume I The simplest works and piano music collection with average rhythm, supporting 740.
Of course, after entering the intermediate stage, you will have a wider choice of small and medium-sized music, and the repertoire of basic piano lessons can no longer meet your needs at that time.