In the spring of 2015, the St. Louis Public School District launched open houses for approximately 30 abandoned and destroyed-beyond-repair schools, in the hopes that potential buyers would be interested in repurposing the buildings. Though some of the schools have since been bought and redeveloped, the tours have an unexpected outcome: a new gallery show opening in Brentwood.“Empty Halls, Silent Classrooms,” which will open at the ReFind Room (2525 South Brentwood Boulevard, Brentwood) August 11, has been curated by Jane Linders.…