Mr. Niravit Chavanachinda, Dhebsirin School, Mr. Thitiwat Asavalertpalakorn, Triamudomsuksa School, Mr. Paris Nilthalak and Ms. Rujeerada Wirojjananuwat, Mahidolwitthayanusorn School each won a silver medal at the 29^th International Biology Olympiad, held in Tehran, the Islamic Republic of Iran during 15 - 22 July 2018.

 270 students from 70 countries all around the world participated in the event.