Always have a backup lesson!

Teaching out here is tricky, you need 4 lessons on you at any one time, Yesterday I walked into class with my powerpoint presentation on a USB ready to go only to find the computer had been virused to hell and was out of action, time to wing it using the blackboard! Another problem is the hot weather, its too hot for the projectors up on the ceiling so they overheat and auto shut off, causing more problems! 
Different classes also take to the subject in different ways, students straight out of chemistry are awful, their heads still full of the previous lesson but precede or follow an english class and it goes much better!

The same class can reject a cool lesson and force you to invent on the fly, not always an easy thing to do, but the worst lessons are when you restort to the text book, bleh! 

Teaching in China is damn difficult!