If it is a child or 7 year old class, may be learn how to be balance in posture standing and moveing is more important.
Tan Tui would be good in practicing to be able in balance in every step and every kick. Power or Jing issueing is not a concern. To pick up a good balance and good habit in postures are more important.
At 5 and 1/2 year old, I was able to do backward Ba Gua walk as well as forward.
My father would say what are you doing?
I said drunken Ba Gua?
At young age, kids pick up stuff quickly and very creative, too.
No serious training till after 13, I think.