Academy School District 20 will host a presentation on school lunches for parents and students.The session is set for 6:30 to 7:30 p.m. Wednesday in the cafeteria at Mountain Ridge Middle School, 9150 Lexington Drive.The district chef and others from Sodexo, who is responsible for catering in D-20, will offer food presentations and discussions to explain the changes with school lunches.Families from outside the district may also attend.