Laurel High School students might soon learn about the excavation site at Troy, the ruins of the Temple of Aphrodite and the dome of Hagia Sophia through the lessons of the school’s art director, Kevin Holder. Holder, 51, was one of 54 teachers nationwide — and the only one from Prince George’s County — selected to participate in a two-week tour of Turkey from June 28 to July 11. The annual trip was sponsored by the Turkish Cultural Foundation, a nonprofit organization promoting Turkish culture, and the World Affairs Councils of America, a nonprofit group promoting cultural exchanges. Both are based in Washington. Holder, of Columbia, said he plans to show images of ceramics, carvings and temple designs to his students, who will be able to use them as inspiration to create works based on Turkish influences.