I was not interested in applying to any of the specialized schools, so I did not take a class to prepare. I instead chose to apply to other prestigious schools that are at the same levels as Stuy or Bronx Science. My best friend however, was intent on getting entrance to Bronx Science. He took a class for the whole summer. It was a Kaplan class and he ended up just slightly missing the cutoff for Bronx Science by one or two points. He says that a lot of things were not mentioned in the course. I would suggest taking the class because ANY preparation is good. I would also suggest applying to other wonderful schools that do not require the test.