This work by Mendelssohn is quite playable by a good high school orchestra. However, there are two viola parts. Few schools have a viola section large enough to split and equal the violin section. My version has Viola in F (transposing viola part in treble clef) that make it possible for violinist to play the viola part ON a viola without learning alto clef.
In addition, I have an optional Advanced Cello part. It is the Viola 2 part to challenge your cellists.
Frank Lestina 