In Queensland State Schools, the normal Term and Holiday Dates are set by the Department of Education and Training, and the 2011 dates are:
Student free dates for 2011
Term One:
Begins: 24th January 2011
Ends: Thursday 14th April 2011
Holiday: 15th April 2011 to 26th April 2011
Term Two:
Begins: 27th April 2011
Ends: 24th June 2011
Holiday: 25th June 2011 to 11th July 2011
Term Three:
Begins: Tuesday 12th July 2011
Ends: 16th September 2011
Holiday: 17th September 2011 to 2nd October 2011
Term Four:
Begins: 3rd October 2011
Ends: 9th December 2011
Holiday: 10th December 2011 to 22nd January 2012
Independent and Catholic schools may vary these dates, sometimes by a week or so, and are all changeable on an individual school basis.
The official website to check the State School dates is: http://education.qld.gov.au
For all Independent and Catholic schools you need to check with the individual school.