Among the most visible signs of Alaska’s shrinking population: several school districts are considering school closures. School districts in Anchorage and Kodiak have already decided to close at least one school later this year, and the Fairbanks North Star Borough School Board will vote on Feb. 4 whether to close five elementary schools. Meanwhile, districts in Ketchikan, Sitka and the Matanuska-Susitna Borough have also warned residents of looming budget shortfalls that may result in school closures or consolidation of programs…