Well if you read my post, you'd have discovered that the subsitutes we have are really unqualified.
Some sleep, chat on their mobiles, can't string a sentence together, eat breakfast in class, talk about their sex life, bitch about other teachers they don't like, bitch about the principal or substandard working conditions or being the bodyguard of Olivia Newton John.
The work our teachers end up leaving is summarise the textbook or do the sheets, usually which have no relavnce to what we are studying.
Then when they come back they forget what work they've left or they say ohh i didn't expect you to do that, I just had to give something to you to make it seem like i was doing my job sufficiently.