Mab, put in one part vinegar to one part water (half fill the pan), bring the saucepan to the boil and then switch it off and leave it till tomorrow. You will find it will come off with a light going over with a scourer.I burnt a saucepan and it was black (couldn't even see the bottom of the pan) and I thought a bin job and a friend told me about this and I thought ahh well nothing to lose ......... but was quite amazed how easily it cleaned !
BZB thanks for the info about the books, I'll keep an eye out for them. I know what it's like trying to get them to put the Andy Griffiths books down ........ my son sneaks them to bed. Teachers think it's great but late nights not soooo great !