does anyone know of a good school, near the above area that does comps, and performances, that has several teachers , and is established

I don't know a lot about the ones in that area in regards to comps and things, but just know that a lot of the comps they do might be in perth so just be aware you might have to travel if you do
In Port Kennedy there is Betty Bentley
www.bettybentleydance.com.au . . .
There's Beverly Margaret School Of Dance in East Rockingham, 9527 7762
and AIM dance company in Mandurah www.aimdancecompany.webs.com
AIM is really the only one I've seen compete (Im sure the others do) And they have some good stuff
It really depends though on what you're after. What syllabus were you looking for? And what age, styles etc?
Hope this helped though

Kwinana Dance Competitions are currently on at the Koorliny Arts Centre and they only let schools in that area (around Kwinana- Including Rockingham) compete. I know, because we aren't allowed to enter as we are too far north (in Canning Vale). It might be worth checking them out, buy a program and see if any schools stand out with styles you are after.
You could also check out Mandurah comps. They seem to be of a bit higher standard, but more schools travel further to compete there so you would have to do some research after to make sure the schools you like are in the area you are wanting.

Reflections Academy of Dance is in Medina and they do Comps, Exams and some of the local fairs as well. They have classes in Classical Ballet, Tap, Contemporary, Jazz, Hiphop and Acro.

Ph 0415 787 726

Cheers