I mentioned in my other blog that we went to CMA, the music place where we bought our piano. While we were there, we bought our daughter a Metronome, a gadget that she can use to check her beats and speed. This cost $29.99 which isn't bad. I am not sure if they have roland ac 33 for sale but you can look it up online if you need one.
My daughter's piano teacher told her to master her timing, tempo and such also she suggested for us to buy her this metronome.