Teaching - worth exapnding upon?

[Fish]

Originally Posted by hal

A teaching skill of 15 becomes relevant in that such a teacher can teach despite any social handicaps such as "accented language" or "shyness" (ie a good teacher despite their shyness) etc.

The munchkin in me says, "Great! One of our team can spend a few points in Teaching and cut all our training times down!" Why should you be able to effectively teach that which you do not know?

How does your system stack up against the RAW, when a teacher is teaching a subject he doesn't know?