It usually takes more than one hour each day, and even longer the day before the class. But my daughter always play or find excuses such as drinking water or go to washroom betweem pieces. This really makes me mad. she doesn't want to hear when I tell her where is wrong, where need to work on. Her teacher even asked her to write piano journal every day to write what need to work on, what have been improved after practicing how long, etc, but since my daughter doesn't really know what need to work on, plus terrible spelling, so she only wrote once. Even I feel difficult and time consuming to keep track of this too. Sometimes I even feel frustrated when my daughter has worked well on the things her teacher asked her to work on but next class her teacher asks her to work on something new for the same piece. I really wish I could know all the things she need to work on at the first time at this point.