Problem in Teaching

Lately,

I have been teaching a group of people on spear..but it seems that there are people who is quite professional and ask me to teach the usage of it..

but just within one hour, what would I expect them to learn..is there really such a time for that?

Should teach external form first and usage together?
or form first?...

those people really make me a headache and confuse..

even last time I learn also I did not get that kind of form + usage..

I wonder they think they can learn in a few months which I completed in years?..

mmh..

so what solution shall I get in order to keep them silent..

May all be well and happy..

sadhu sadhu sadhu...