I haven't taken lessons since January, and I'm still somewhat of an intermediate beginner in my playing ability. I know how to count music and such, but for the summer I will be learning:
Minuets K.1 - 6 -- Mozart
Allegro K1 -- Mozart
3 Minuets, Musette, and March from the Notebook for Anna Magdalena -- Bach
Op. 100, Nos. 1, 2, and 3 -- Burgmuller
Spinning Song -- Elmenreich
Waltz in B Flat -- Schubert
I'm going through the Mozart and Bach at a pretty rapid rate. I'm learning about one of those pieces per week, so it shouldn't take me too long. After two days of learning it, I can practically play the Spinning Song perfectly, and I've just begun sight reading the Schubert Waltz, and it's very easy. The same goes for the Burgmuller. If I finish all the material by Mozart, Bach, and Burgmuller, I will add:
Op. 100 Nos. 5, 14, and 19
Sonatina Op. 55 No. 1 -- Kuhlau
Sonatina Op. 36 No. 1 -- Clementi
And when I get tired of those, sometimes I sightread Satie's Gymnopedie No. 1 just for fun. I may add that to the list, depending on how fast I get through the current pieces.