Vivace (by Cornelius Gurlitt)
This beautiful song requires us to play two notes at the same time in the left hand. It is recommended that the pupil first practices measure one and two repeatedly (left hand only), with a little pause between the notes. It takes a lot of finger coordination to separate out two fingers without pressing keys with the non-active fingers at the same time.
Here is a great exercise: lift the active fingers while resting the non active fingers on the keyboard.