Eu diria assim.

--------------------------------------------------
Note added at 2005-05-06 07:14:06 (GMT)
--------------------------------------------------

Aqui na Austrália, \"principal\" usa-se para escolas primárias e secundárias.

--------------------------------------------------
Note added at 2005-05-06 07:19:17 (GMT)
--------------------------------------------------

CHANCELLOR é o equivalente ao reitor em Portugal

Dean é o director de faculdade

Veja este dois exemplos, da melbourne University e da University of Queensland:


The University of Melbourne

Motto Postera Crescam Laude
\"We grow in the esteem of future generations\"
Established 1853
University type Public

Chancellor Ian Renard


University of Queensland: Information From Answers.com
... The Honourable Sir Llewellyn Edwards, AC is the Chancellor of the University
of Queensland and the current Deputy Chancellor is Professor Robert N. ...
www.answers.com/topic/university-of-queensland

Vice-Chancellor Professor Glyn Davis
Location Parkville, Vic., Australia

Embora "dean" também possa ser reitor, aplica-se mais no sentido de deão ou decano de uma universidade. A palavra é mesmo "Principal". Pelo menos é a que se usa em Inglaterra, onde vivo.

reitor
substantivo masculino
· headmaster (of a school);
· principal (of college);
· RELIGIÃO
parish priest;
reitor de uma universidade
principal of a university;
© Porto Editora, Lda. - 2000

The head of the whole institution. (The Chancellor is just a figurehead). Principal is the head of a school or higher education institution with lesser status than a university, and Deans and Directors are heads of faculties, not institutions, or you may have Dean of Studies, for example, as the Academic Head of the institution.

That is it.