As someone who's been at the receiving end of attempted teaching sessions (which occured because the self-appointed teachers overestimated their own knowledge,

As someone who's been at the receiving end of attempted teaching sessions (which occured because the self-appointed teachers overestimated their own knowledge, underestimated mine and never bothered finding out what I knew), I can only say that the best programmers do not try to teach, but will gladly share what they know when asked.