The Tableaux is a great piece! I have played it numerous times and suspect I will play it more in the future. As far as a grade level is concerned it is about medium-hard. I have heard juniors in high school play it, and juniors in college that couldn't. It really depends on the player. The last movement is by far the most challenging (tempo alone). Work on it slowly and with a metronome until you feel comfortable at a faster speed. Start rehearsing with your accompianist as soon as possible so the ensemble will be familiar and tight. Good Luck Tracy