QUOTE(rumba @ Oct 14 2007, 08:03 PM)

It varies form county to county. Some are hourly paid (typically £17-20 round here), but of course that only covers the hours you teach. I visit 16 schools a week, 6 of these for between 30mins to 45 mins, several at 1 hour. The driving time between schools, the signing in/out and setting up add up to about 12 hours or more, not
explicitly paid. I actually teach (get paid) for about 20 hours, but its a full time job in that I am out from 8am-4pm 5 days a week, + saturday morning, during term time. There is no job security - If a parent decides to stop their lesson, you don't get paid, and recruiting a replacement pupil isn't easy or quick. I think most music services give contracts - - mine says I am expected to work for eg 15 hours, only 10 of this is guarranteed and pensionable, the rest is 'additional hours' ie like overtime, doesn't count towards pension or holiday etc.
So in answer to you question, there are lots of disadvantages.
ON the other hand, I like the 'flexibility' - I am required to provide 10 lessons per term, and within reason I can take days off and reschdule my teaching if I need to. It cannot be done in 10 weeks of course, I always have to work every week of term, but get paid for the 10, because each of my 16 schools has it's own programme of INSET days, school trips, school plays which means none of the 10 weeks is the same, and in any one week somewhere will not want me. The 'free time' is mine, but often its inconvenient as I am 25 miles from home, and can't use it well. Is it rewarding - well generally yes, although it has it's moments! Financially you are a full timer on part time pay, but to an an extent you are your own boss, you are in control of each lesson, and can choose your own materials and teaching style. It can be lonely - I often don't talk to colleagues from one end of term to the other, so you have to able to cope with that!
This sounds pretty tough to me. I also work as a peri, doing about 35 hours in 5 schools & 3 music centres (mid-afternoon/evenings & Saturday mornings). The least amount of time I spend in one place is 2 hours 20 mins, but it's often 4 to 5 hours. I'm hourly paid, but the rate is a bit better than the one you quote (but would be lower for someone just starting out). Our pay has recently become pensionable & we work officially 11 weeks per term, although I find I usually have to do more than that to fit the lessons in - I'm not actually obliged to make up lessons if there's a school trip or INSET day, but it's advisable to keep the goodwill.
There never seems to be a shortage of pupils & I've always got plenty of work, often a waiting list. Parents are required to give half a term's notice if they want to give up & I don't find many do give up, it's mostly a case of children leaving the school & there are usually new ones coming along.
I enjoy the work very much, although it is very tiring. I have to work very long hours to make a living - there's quite a lot of extra time that isn't paid, such as driving, planning, setting up, reports, concerts, exam entries etc. We are free to use our own methods, but are monitored by managers & are expected to attend INSET every term. I think availability of work varies a lot from area to area & also depends on how popular your instrument is. I think I'm lucky being in an area where music is valued & that I teach a popular instrument. I do see a reasonable amount of my colleagues, which is nice & I tend to make friends with the school secretaries who arrange everything.