There's Saint-Saëns étude op. 52 no 2. An absolute killer though...but could be useful even just played very slowly.
I would try it with Bach's chorales. My teacher used to make me voice each part as I was learning intermediate harmony. It was really helpful for me!
Greetings everyone... I'm currently looking for easy SATB type material notated on 2 staves (SA-Treble, TB-Bass, not the separate S A T B staves), preferably on IMSLP if possible. The easier the better, only because I have a student who desperately needs help with his voicing in playing chords, and I want him to try and begin to voice each part independently, and begin to cleanly play one voice over the others. I would really appreciate any scores - nothing too 20th century, just folk tunes, melodies, whatever - but rather easy to learn for a student who is learning at about a Grade 7 level. Thank you.
I think the perfect piece would be the short Chopin prelude op28 no 20. Half a page long, the chords may be a little complex depending on the student, but it is played at a largo tempo and it is fun to try to voice it out in different ways due to the cheesiness of the melancholy melody.