Students often go to youtube to listen to their pieces, here's another option where the pieces are played by a college professor so you know it's done correctly.
University of Iowa, Piano Pedagogy project: click here to listen to a "pro" perform your pieces. It will inspire you and show you how it's done!
www.alanhuckleberry.com/the-university-of-iowa-piano-pedagogy-video-recording-project.html



Need to review your notes? want to play some fun rhythm games? improve your listening skills? Here is a list of apps that I recommend.

For note recognition:
Note Rush--for Apple or android, 3.99--5 levels, great game, beginners through upper elementary
Treble Cat & Bass Cat--for Apple or android, 4.99 or part of a 3 game set, 8.9 or the lite version free
Note Works Lite, free--Apple--elementary age

For rhythm:
Rhythm cat-part of Treble and Bass Cat package
Rhythm Lab--Apple, 2.99 from very easy to very difficult rhythms, for 1 hand or 2, great practice
Rhythm Swing--Apple3.99--super fun with a monkey that gets eaten by a dragon if you fail, elementary age
The Most Addicting Sheep Game--Apple .99--dumb but fun way to practice keeping a steady beat

Ear training:
Tenuto--Apple 3.99
Stick people--Apple, 1.99, listen for the music to go up or down, choose the stick man that shows what you hear, mostly elementary age
Ear Trainer Lite--Apple, free--intervals, chords, scales, melodies, for intermediate or advanced levels
Ear Master--intervals, chords, scales, rhythm, melodies--for intermediate or advanced levels, this app has drills and tutorials (lessons)

Theory:
Tenuto--Apple 3.99--some for older elementary or intermediate or advanced level students, very good for drilling theory and ear training
Dragon scales--Apple 2.99-- fun way to practice Major & minor scales

Sight reading:
Read Ahead--Apple or android, free--this is a great sight reading app for multiple levels