Florida’s Supreme Court justices gave just a few hints Thursday of how they’re thinking about a 9-year-old case that contends, essentially, that the Legislature has shortchanged some students in the state’s public education system. The case, Citizens for Strong Schools vs. Florida Board of Education, focuses on the Florida constitution’s mandate that the state has a “paramount duty” to provide for a “uniform, efficient, safe, secure, and high quality system of free public schools.”