That would lead to the Mt Druitt debacle all over again - see e.g.
here (scroll down to Mt Druitt heading).
Ranking schools by publishing league tables etc is a very controversial issue in education and is generally seen to be highly undesirable - because it is essentially useless both as a measure of the 'value' of a school as well as in terms of accountability, and it doesn't do anything to help schools with genuine needs.
Schools attended by very smart kids will appear at the top of the tables even if the schools themselves aren't very good.
Since the Mt Druitt debacle the publication of results which could be used to create league tables has also been unlawful in New South Wales:
EDUCATION REGULATION 2007
4 Publication of results and other matters
(1) This clause applies to the following results:
(a) ...
(b) results of School Certificate and Higher School Certificate examinations and related assessments,
(c) ...
...
(5) Results to which this clause applies must not be publicly revealed in a way that ranks or otherwise
compares the results of particular schools.
A method of ranking schools that is seen to be somewhat more acceptable is the 'value-added' method, which compares the performances of students from that school at two different points in time (e.g. Year 10, Year 12) and the school is assessed by the extent to which the students have improved during that time.