The level generally encompasses "Level 2" of the major method books. For example:
Alfred's Premier 2A and 2b
Piano Adventures 2A and 2B
Piano Pronto Movement 1 and 2
Hal Leonard Book 3
Everything starts to sound a lot more impressive at this level as we add more accidentals, explore a wider dynamice range and travel to different registers of the piano. No boredom here!