i like teaching girl prentice.

1st girls are far more aggressive than boys when they are playing weiqi. through constant attacking and defencing, girls can quickly understand those elementary concepts of this profound game.
2nd girls are far more realistic. they will try to claim territory near corners and sides after playing 2 or 3 games. boys love romantic things so inevitably 3-stars-line openning will be used by most of boys. (personally i don't like 3-stars-line openning and it is hard for beginners to handle)
3rd girls are far more resolute than boys. (i am not exaggerating here.) girls can always withstand a major loss at beginning and try to overwhelm you in the latter part of the game. on the other side, i am a boy (so can take me as an instance) and my endurance is crappy. whenever boys feel the hope is vanishing, they will choose surrender.
4th in my point of view, girls are far more attractive to my apples. a cute girl is always a great incentive to me (in fact not only me lah, can be applied to every boy). undoubtedly speaking, a boy will be more serious if his trainee is a girl!