Rachmaninoff had huge hands, and his music shows it. He was also a consummate virtuoso (some have argued he was the greatest pianist ever), and again his music shows it. There is nothing there that could be called “easy”

. However, if your student is on grade 7/8, s/eh should be at the stage of starting to tackle the advanced repertory, so Rachmaninoff may just be the challenge s/he needs.

The most accessible pieces of his are the
“Four Improvisations” which are around grade 7, and completely obscure. Each improvisation is just one page long and they are based on themes by Arensky, Glazunov, Taneyev and Rachmaninoff himself. They are published by Hinshaw.
Next come his
“Three Nocturnes” (Hal Leonard), around grades 7/8. Nocturne no. 3 is similar to the famous prelude in C#minor and could be used to lead on to it.
More difficult, but still around the grade 8 level are the
”Two Fantasy pieces” (Hinshaw). No. 2 is the easiest of the two, and they have no opus number. Not to be confused with the
”Fantasy pieces” op. 3, the easiest of which is arguably no. 3 (
”Melodie”) where a cello like melody appears successively in four voices. All of them (no. 1
”Elegie”; no. 2
Prelude in C#m; no. 4
”Polichinelle”; no. 5
”Serenade”) are grade 8 or slightly above.
As m1469 mentioned, the
”Morceaux de Salon” op. 10 – of which there are five, are also grade 8 or just above it. Particularly satisfying are no.1
Nocturne, no. 2
”Valse” and no. 5
”Humoresque”.
Finally, of the preludes the easiest (grade 8 or just above) are op. 23 no. 5 in Gm, op. 32 no. 5 in G and op. 32 no. 12 in G#m
Best wishes,
Bernhard.