Allowing some school districts to opt for the ACT or SAT in place of the standardized tests Florida requires to earn a high school diploma is “not appropriate,” a new study released this week determined. The study was required by a sweeping education law passed by lawmakers last year, with the goal of determining whether the two national college admissions exams could be swapped for Florida’s algebra 1 test and its 10th-grade language arts test — both required for high school graduation.