I am not sure if giving a piece full of that coordination is a kind thing to do ahha.
Also, I'm a little shocked at the repertoire suggestions. .... And the Scriabin also boasts a challenging key for students, wide leaps, and challenging voicing and ties. What's wrong with Debussy's First Arabesque? (Even that's a challenging one, but I haven't yet come across an easier piece with that rhythmic challenge. I've been looking for a good prep piece for the Arabesque...)
Very much agreed! Why are you tackling it in a piece? Play a C major scale - RH triplets LH eighths, then switch. Or the eighth note (quaver) hand could simply do repeated C's. The student should not be struggling to learn notes and fingerings AND a challenging rhythmic coordination. Also, try words instead of rhythm solfege. I use "One(B) cup(R)-of(L)-tea(R)." Sending the student home with recordings is big, also. I have a student working on the Chopin Nocturne in C# minor, Op. Post. We tackled the rhythm by playing together in the lesson, and I sent her home with a clip of me playing the passage.Also, I'm a little shocked at the repertoire suggestions. A student who can't handle the basic 3 against 2 rhythmic pattern certainly won't be able to switch the triplet back and forth from one hand to the other as in the Saint-Saens etude. And the Scriabin also boasts a challenging key for students, wide leaps, and challenging voicing and ties.