Well these schools can differ a lot in what you might want exactly but as for locals in Dubai or any other emirate, the best secondary school to join would be @Institute of Applied Technology but for other nationality most would recommend @The International School of Choueifat but there are many just as good schools in both secondary and primary learning like @Raffles International School, West Campus , @Al Mawakeb School and @Dubai International School
. These are not the best but they've brought up good quality graduates which is all what parents need. Doesn't mean all the rest are bad schools.
Another school I recommend for British curriculum would be @GEMS Wellington Academy Silicon Oasis .