Lincher's Op.49, NO.1

[Doreamon]

Hi,
I m playing a piece on H. Lichner.O.p. 49,, NO 1  the third page on page 21 , i had a problem is when the piano teacher give me a piece to go home practice, the weird thing is i find the wrong note go to the wrong ocative , i practice the wrong thing and when i go back on lesson at the next week, i feel so embrass that i me playing the wrong thing that i had to make correction right by the way to make sure i m playing the right page b4 i go home, can i ask u guys how can i escape this situation to be happen. thxs so much!!!!!!!!